Finding the Fourth Proportional to 58,128.38, 80,241.27 and 39,291.02

Step by Step Solution

1. Step 1: Write the proportion equation
   58,128.38 : 80,241.27 = 39,291.02 : x
2. Step 2: Convert to fraction form
   58,128.38/80,241.27 = 39,291.02/x
3. Step 3: Cross multiply
   58,128.38x = 80,241.27 × 39,291.02
4. Step 4: Simplify right side
   58,128.38x = 3,152,761,344.40
5. Step 5: Solve for x
   x = 3,152,761,344.40/58,128.38
6. Step 6: Final answer
   x = 54,237.90