Finding the Fourth Proportional to 139,216.52, 208,816.14 and 60,275.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,216.52 : 208,816.14 = 60,275.72 : x
2. Step 2: Convert to fraction form
   139,216.52/208,816.14 = 60,275.72/x
3. Step 3: Cross multiply
   139,216.52x = 208,816.14 × 60,275.72
4. Step 4: Simplify right side
   139,216.52x = 12,586,543,186.12
5. Step 5: Solve for x
   x = 12,586,543,186.12/139,216.52
6. Step 6: Final answer
   x = 90,409.84