Finding the Fourth Proportional to 139,288,522.56, 192,158,536.32 and 86,986,757.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,288,522.56 : 192,158,536.32 = 86,986,757.76 : x
2. Step 2: Convert to fraction form
   139,288,522.56/192,158,536.32 = 86,986,757.76/x
3. Step 3: Cross multiply
   139,288,522.56x = 192,158,536.32 × 86,986,757.76
4. Step 4: Simplify right side
   139,288,522.56x = 16,715,248,050,384,002
5. Step 5: Solve for x
   x = 16,715,248,050,384,002/139,288,522.56
6. Step 6: Final answer
   x = 120,004,489.55