Finding the Fourth Proportional to 139,114.75, 208,699.18 and 59,151.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,114.75 : 208,699.18 = 59,151.80 : x
2. Step 2: Convert to fraction form
   139,114.75/208,699.18 = 59,151.80/x
3. Step 3: Cross multiply
   139,114.75x = 208,699.18 × 59,151.80
4. Step 4: Simplify right side
   139,114.75x = 12,344,932,155.52
5. Step 5: Solve for x
   x = 12,344,932,155.52/139,114.75
6. Step 6: Final answer
   x = 88,739.20