Finding the Fourth Proportional to 139,047.60, 208,446.66 and 50,280.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,047.60 : 208,446.66 = 50,280.24 : x
2. Step 2: Convert to fraction form
   139,047.60/208,446.66 = 50,280.24/x
3. Step 3: Cross multiply
   139,047.60x = 208,446.66 × 50,280.24
4. Step 4: Simplify right side
   139,047.60x = 10,480,748,092.00
5. Step 5: Solve for x
   x = 10,480,748,092.00/139,047.60
6. Step 6: Final answer
   x = 75,375.25