Finding the Fourth Proportional to 82,589.81, 123,686.06 and 57,219.39

Step by Step Solution

1. Step 1: Write the proportion equation
   82,589.81 : 123,686.06 = 57,219.39 : x
2. Step 2: Convert to fraction form
   82,589.81/123,686.06 = 57,219.39/x
3. Step 3: Cross multiply
   82,589.81x = 123,686.06 × 57,219.39
4. Step 4: Simplify right side
   82,589.81x = 7,077,240,618.61
5. Step 5: Solve for x
   x = 7,077,240,618.61/82,589.81
6. Step 6: Final answer
   x = 85,691.46