Finding the Fourth Proportional to 139,089.30, 208,541.76 and 50,331.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,089.30 : 208,541.76 = 50,331.25 : x
2. Step 2: Convert to fraction form
   139,089.30/208,541.76 = 50,331.25/x
3. Step 3: Cross multiply
   139,089.30x = 208,541.76 × 50,331.25
4. Step 4: Simplify right side
   139,089.30x = 10,496,167,458
5. Step 5: Solve for x
   x = 10,496,167,458/139,089.30
6. Step 6: Final answer
   x = 75,463.52