Finding the Fourth Proportional to 31,724.61, 47,496.20 and 21,317.73

Step by Step Solution

1. Step 1: Write the proportion equation
   31,724.61 : 47,496.20 = 21,317.73 : x
2. Step 2: Convert to fraction form
   31,724.61/47,496.20 = 21,317.73/x
3. Step 3: Cross multiply
   31,724.61x = 47,496.20 × 21,317.73
4. Step 4: Simplify right side
   31,724.61x = 1,012,511,061.04
5. Step 5: Solve for x
   x = 1,012,511,061.04/31,724.61
6. Step 6: Final answer
   x = 31,915.63