Finding the Fourth Proportional to 19,123,468.80, 26,389,618.56 and 10,421,454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,123,468.80 : 26,389,618.56 = 10,421,454.72 : x
2. Step 2: Convert to fraction form
   19,123,468.80/26,389,618.56 = 10,421,454.72/x
3. Step 3: Cross multiply
   19,123,468.80x = 26,389,618.56 × 10,421,454.72
4. Step 4: Simplify right side
   19,123,468.80x = 275,018,214,901,111.59
5. Step 5: Solve for x
   x = 275,018,214,901,111.59/19,123,468.80
6. Step 6: Final answer
   x = 14,381,188.78