Finding the Fourth Proportional to 152,156,924.79, 209,868,310.43 and 139,638,404.68

Step by Step Solution

1. Step 1: Write the proportion equation
   152,156,924.79 : 209,868,310.43 = 139,638,404.68 : x
2. Step 2: Convert to fraction form
   152,156,924.79/209,868,310.43 = 139,638,404.68/x
3. Step 3: Cross multiply
   152,156,924.79x = 209,868,310.43 × 139,638,404.68
4. Step 4: Simplify right side
   152,156,924.79x = 29,305,676,061,332,208
5. Step 5: Solve for x
   x = 29,305,676,061,332,208/152,156,924.79
6. Step 6: Final answer
   x = 192,601,658.46