Finding the Fourth Proportional to 139,007,382, 191,149,942.68 and 120,640,781.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,007,382 : 191,149,942.68 = 120,640,781.04 : x
2. Step 2: Convert to fraction form
   139,007,382/191,149,942.68 = 120,640,781.04/x
3. Step 3: Cross multiply
   139,007,382x = 191,149,942.68 × 120,640,781.04
4. Step 4: Simplify right side
   139,007,382x = 23,060,478,380,666,432
5. Step 5: Solve for x
   x = 23,060,478,380,666,432/139,007,382
6. Step 6: Final answer
   x = 165,893,911.88