Finding the Fourth Proportional to 139,025.68, 208,567.68 and 60,151.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,025.68 : 208,567.68 = 60,151.12 : x
2. Step 2: Convert to fraction form
   139,025.68/208,567.68 = 60,151.12/x
3. Step 3: Cross multiply
   139,025.68x = 208,567.68 × 60,151.12
4. Step 4: Simplify right side
   139,025.68x = 12,545,579,547.80
5. Step 5: Solve for x
   x = 12,545,579,547.80/139,025.68
6. Step 6: Final answer
   x = 90,239.30