Finding the Fourth Proportional to 62,492.72, 86,280.19 and 55,766.78

Step by Step Solution

1. Step 1: Write the proportion equation
   62,492.72 : 86,280.19 = 55,766.78 : x
2. Step 2: Convert to fraction form
   62,492.72/86,280.19 = 55,766.78/x
3. Step 3: Cross multiply
   62,492.72x = 86,280.19 × 55,766.78
4. Step 4: Simplify right side
   62,492.72x = 4,811,568,126.82
5. Step 5: Solve for x
   x = 4,811,568,126.82/62,492.72
6. Step 6: Final answer
   x = 76,994.06