Finding the Fourth Proportional to 82,864.72, 124,298.34 and 20,535.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,864.72 : 124,298.34 = 20,535.28 : x
2. Step 2: Convert to fraction form
   82,864.72/124,298.34 = 20,535.28/x
3. Step 3: Cross multiply
   82,864.72x = 124,298.34 × 20,535.28
4. Step 4: Simplify right side
   82,864.72x = 2,552,501,215.44
5. Step 5: Solve for x
   x = 2,552,501,215.44/82,864.72
6. Step 6: Final answer
   x = 30,803.23