Finding the Fourth Proportional to 62,139.15, 85,770.90 and 58,964.76

Step by Step Solution

1. Step 1: Write the proportion equation
   62,139.15 : 85,770.90 = 58,964.76 : x
2. Step 2: Convert to fraction form
   62,139.15/85,770.90 = 58,964.76/x
3. Step 3: Cross multiply
   62,139.15x = 85,770.90 × 58,964.76
4. Step 4: Simplify right side
   62,139.15x = 5,057,460,533.48
5. Step 5: Solve for x
   x = 5,057,460,533.48/62,139.15
6. Step 6: Final answer
   x = 81,389.28