Finding the Fourth Proportional to 9,358,490,826.18, 12,915,029,667.69 and 5,129,413,551.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,358,490,826.18 : 12,915,029,667.69 = 5,129,413,551.23 : x
2. Step 2: Convert to fraction form
   9,358,490,826.18/12,915,029,667.69 = 5,129,413,551.23/x
3. Step 3: Cross multiply
   9,358,490,826.18x = 12,915,029,667.69 × 5,129,413,551.23
4. Step 4: Simplify right side
   9,358,490,826.18x = 66,246,528,191,922,003,968
5. Step 5: Solve for x
   x = 66,246,528,191,922,003,968/9,358,490,826.18
6. Step 6: Final answer
   x = 7,078,761,888.25