Finding the Fourth Proportional to 52,635.52, 72,634.84 and 31,139.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,635.52 : 72,634.84 = 31,139.20 : x
2. Step 2: Convert to fraction form
   52,635.52/72,634.84 = 31,139.20/x
3. Step 3: Cross multiply
   52,635.52x = 72,634.84 × 31,139.20
4. Step 4: Simplify right side
   52,635.52x = 2,261,790,809.73
5. Step 5: Solve for x
   x = 2,261,790,809.73/52,635.52
6. Step 6: Final answer
   x = 42,970.81