Finding the Fourth Proportional to 139,007,289, 191,149,814.34 and 120,640,688.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,007,289 : 191,149,814.34 = 120,640,688.04 : x
2. Step 2: Convert to fraction form
   139,007,289/191,149,814.34 = 120,640,688.04/x
3. Step 3: Cross multiply
   139,007,289x = 191,149,814.34 × 120,640,688.04
4. Step 4: Simplify right side
   139,007,289x = 23,060,445,120,695,860
5. Step 5: Solve for x
   x = 23,060,445,120,695,860/139,007,289
6. Step 6: Final answer
   x = 165,893,783.60