Finding the Fourth Proportional to 82,905.55, 114,496.50 and 57,131.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82,905.55 : 114,496.50 = 57,131.12 : x
2. Step 2: Convert to fraction form
   82,905.55/114,496.50 = 57,131.12/x
3. Step 3: Cross multiply
   82,905.55x = 114,496.50 × 57,131.12
4. Step 4: Simplify right side
   82,905.55x = 6,541,312,422.94
5. Step 5: Solve for x
   x = 6,541,312,422.94/82,905.55
6. Step 6: Final answer
   x = 78,900.78