Finding the Fourth Proportional to 139,053.94, 208,457.20 and 50,287.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,053.94 : 208,457.20 = 50,287.71 : x
2. Step 2: Convert to fraction form
   139,053.94/208,457.20 = 50,287.71/x
3. Step 3: Cross multiply
   139,053.94x = 208,457.20 × 50,287.71
4. Step 4: Simplify right side
   139,053.94x = 10,482,835,034.45
5. Step 5: Solve for x
   x = 10,482,835,034.45/139,053.94
6. Step 6: Final answer
   x = 75,386.83