Finding the Fourth Proportional to 82,760.77, 124,141.47 and 20,431.27

Step by Step Solution

1. Step 1: Write the proportion equation
   82,760.77 : 124,141.47 = 20,431.27 : x
2. Step 2: Convert to fraction form
   82,760.77/124,141.47 = 20,431.27/x
3. Step 3: Cross multiply
   82,760.77x = 124,141.47 × 20,431.27
4. Step 4: Simplify right side
   82,760.77x = 2,536,367,970.33
5. Step 5: Solve for x
   x = 2,536,367,970.33/82,760.77
6. Step 6: Final answer
   x = 30,646.98