Finding the Fourth Proportional to 59,808.96, 81,938.72 and 57,566.88

Step by Step Solution

1. Step 1: Write the proportion equation
   59,808.96 : 81,938.72 = 57,566.88 : x
2. Step 2: Convert to fraction form
   59,808.96/81,938.72 = 57,566.88/x
3. Step 3: Cross multiply
   59,808.96x = 81,938.72 × 57,566.88
4. Step 4: Simplify right side
   59,808.96x = 4,716,956,461.59
5. Step 5: Solve for x
   x = 4,716,956,461.59/59,808.96
6. Step 6: Final answer
   x = 78,867.05