Finding the Fourth Proportional to 62,980.56, 86,875.02 and 40,311.57

Step by Step Solution

1. Step 1: Write the proportion equation
   62,980.56 : 86,875.02 = 40,311.57 : x
2. Step 2: Convert to fraction form
   62,980.56/86,875.02 = 40,311.57/x
3. Step 3: Cross multiply
   62,980.56x = 86,875.02 × 40,311.57
4. Step 4: Simplify right side
   62,980.56x = 3,502,068,449.98
5. Step 5: Solve for x
   x = 3,502,068,449.98/62,980.56
6. Step 6: Final answer
   x = 55,605.55