Finding the Fourth Proportional to 82,978.43, 124,467.67 and 20,648.93

Step by Step Solution

1. Step 1: Write the proportion equation
   82,978.43 : 124,467.67 = 20,648.93 : x
2. Step 2: Convert to fraction form
   82,978.43/124,467.67 = 20,648.93/x
3. Step 3: Cross multiply
   82,978.43x = 124,467.67 × 20,648.93
4. Step 4: Simplify right side
   82,978.43x = 2,570,124,205.09
5. Step 5: Solve for x
   x = 2,570,124,205.09/82,978.43
6. Step 6: Final answer
   x = 30,973.40