Finding the Fourth Proportional to 31,990.61, 47,961.14 and 21,443.73

Step by Step Solution

1. Step 1: Write the proportion equation
   31,990.61 : 47,961.14 = 21,443.73 : x
2. Step 2: Convert to fraction form
   31,990.61/47,961.14 = 21,443.73/x
3. Step 3: Cross multiply
   31,990.61x = 47,961.14 × 21,443.73
4. Step 4: Simplify right side
   31,990.61x = 1,028,465,629.43
5. Step 5: Solve for x
   x = 1,028,465,629.43/31,990.61
6. Step 6: Final answer
   x = 32,148.99