Finding the Fourth Proportional to 139,251.31, 208,812.16 and 50,501.23

Step by Step Solution

1. Step 1: Write the proportion equation
   139,251.31 : 208,812.16 = 50,501.23 : x
2. Step 2: Convert to fraction form
   139,251.31/208,812.16 = 50,501.23/x
3. Step 3: Cross multiply
   139,251.31x = 208,812.16 × 50,501.23
4. Step 4: Simplify right side
   139,251.31x = 10,545,270,918.96
5. Step 5: Solve for x
   x = 10,545,270,918.96/139,251.31
6. Step 6: Final answer
   x = 75,728.34