Finding the Fourth Proportional to 128,204,328.86, 176,922,589.72 and 69,466,978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   128,204,328.86 : 176,922,589.72 = 69,466,978.40 : x
2. Step 2: Convert to fraction form
   128,204,328.86/176,922,589.72 = 69,466,978.40/x
3. Step 3: Cross multiply
   128,204,328.86x = 176,922,589.72 × 69,466,978.40
4. Step 4: Simplify right side
   128,204,328.86x = 12,290,277,718,819,942
5. Step 5: Solve for x
   x = 12,290,277,718,819,942/128,204,328.86
6. Step 6: Final answer
   x = 95,864,763.92