Finding the Fourth Proportional to 139,041.49, 208,592.61 and 50,285.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,041.49 : 208,592.61 = 50,285.74 : x
2. Step 2: Convert to fraction form
   139,041.49/208,592.61 = 50,285.74/x
3. Step 3: Cross multiply
   139,041.49x = 208,592.61 × 50,285.74
4. Step 4: Simplify right side
   139,041.49x = 10,489,233,752.38
5. Step 5: Solve for x
   x = 10,489,233,752.38/139,041.49
6. Step 6: Final answer
   x = 75,439.60