Finding the Fourth Proportional to 139,145.92, 208,750.72 and 60,273.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,145.92 : 208,750.72 = 60,273.28 : x
2. Step 2: Convert to fraction form
   139,145.92/208,750.72 = 60,273.28/x
3. Step 3: Cross multiply
   139,145.92x = 208,750.72 × 60,273.28
4. Step 4: Simplify right side
   139,145.92x = 12,582,090,596.76
5. Step 5: Solve for x
   x = 12,582,090,596.76/139,145.92
6. Step 6: Final answer
   x = 90,423.71