Finding the Fourth Proportional to 139,428,449.86, 192,397,781.37 and 80,679,396.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,428,449.86 : 192,397,781.37 = 80,679,396.10 : x
2. Step 2: Convert to fraction form
   139,428,449.86/192,397,781.37 = 80,679,396.10/x
3. Step 3: Cross multiply
   139,428,449.86x = 192,397,781.37 × 80,679,396.10
4. Step 4: Simplify right side
   139,428,449.86x = 15,522,536,811,911,430
5. Step 5: Solve for x
   x = 15,522,536,811,911,430/139,428,449.86
6. Step 6: Final answer
   x = 111,329,766.83