Finding the Fourth Proportional to 50,123.61, 69,156.59 and 39,480.21

Step by Step Solution

1. Step 1: Write the proportion equation
   50,123.61 : 69,156.59 = 39,480.21 : x
2. Step 2: Convert to fraction form
   50,123.61/69,156.59 = 39,480.21/x
3. Step 3: Cross multiply
   50,123.61x = 69,156.59 × 39,480.21
4. Step 4: Simplify right side
   50,123.61x = 2,730,316,498.68
5. Step 5: Solve for x
   x = 2,730,316,498.68/50,123.61
6. Step 6: Final answer
   x = 54,471.67