Finding the Fourth Proportional to 152,156,924.29, 209,868,309.75 and 139,638,404.18

Step by Step Solution

1. Step 1: Write the proportion equation
   152,156,924.29 : 209,868,309.75 = 139,638,404.18 : x
2. Step 2: Convert to fraction form
   152,156,924.29/209,868,309.75 = 139,638,404.18/x
3. Step 3: Cross multiply
   152,156,924.29x = 209,868,309.75 × 139,638,404.18
4. Step 4: Simplify right side
   152,156,924.29x = 29,305,675,859,696,404
5. Step 5: Solve for x
   x = 29,305,675,859,696,404/152,156,924.29
6. Step 6: Final answer
   x = 192,601,657.78