Finding the Fourth Proportional to 55,460, 83,139.24 and 20,372.96

Step by Step Solution

1. Step 1: Write the proportion equation
   55,460 : 83,139.24 = 20,372.96 : x
2. Step 2: Convert to fraction form
   55,460/83,139.24 = 20,372.96/x
3. Step 3: Cross multiply
   55,460x = 83,139.24 × 20,372.96
4. Step 4: Simplify right side
   55,460x = 1,693,792,410.95
5. Step 5: Solve for x
   x = 1,693,792,410.95/55,460
6. Step 6: Final answer
   x = 30,540.79