Finding the Fourth Proportional to 12,978,938,394.06, 19,467,822,562.92 and 5,412,607,386.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,938,394.06 : 19,467,822,562.92 = 5,412,607,386.54 : x
2. Step 2: Convert to fraction form
   12,978,938,394.06/19,467,822,562.92 = 5,412,607,386.54/x
3. Step 3: Cross multiply
   12,978,938,394.06x = 19,467,822,562.92 × 5,412,607,386.54
4. Step 4: Simplify right side
   12,978,938,394.06x = 105,371,680,203,910,856,704
5. Step 5: Solve for x
   x = 105,371,680,203,910,856,704/12,978,938,394.06
6. Step 6: Final answer
   x = 8,118,667,105.48