Finding the Fourth Proportional to 82,799.79, 124,199.97 and 20,470.29

Step by Step Solution

1. Step 1: Write the proportion equation
   82,799.79 : 124,199.97 = 20,470.29 : x
2. Step 2: Convert to fraction form
   82,799.79/124,199.97 = 20,470.29/x
3. Step 3: Cross multiply
   82,799.79x = 124,199.97 × 20,470.29
4. Step 4: Simplify right side
   82,799.79x = 2,542,409,403.89
5. Step 5: Solve for x
   x = 2,542,409,403.89/82,799.79
6. Step 6: Final answer
   x = 30,705.51