Finding the Fourth Proportional to 62,605.59, 86,435.96 and 55,879.76

Step by Step Solution

1. Step 1: Write the proportion equation
   62,605.59 : 86,435.96 = 55,879.76 : x
2. Step 2: Convert to fraction form
   62,605.59/86,435.96 = 55,879.76/x
3. Step 3: Cross multiply
   62,605.59x = 86,435.96 × 55,879.76
4. Step 4: Simplify right side
   62,605.59x = 4,830,019,988.59
5. Step 5: Solve for x
   x = 4,830,019,988.59/62,605.59
6. Step 6: Final answer
   x = 77,149.98