Finding the Fourth Proportional to 31,633.47, 47,414.34 and 12,889.89

Step by Step Solution

1. Step 1: Write the proportion equation
   31,633.47 : 47,414.34 = 12,889.89 : x
2. Step 2: Convert to fraction form
   31,633.47/47,414.34 = 12,889.89/x
3. Step 3: Cross multiply
   31,633.47x = 47,414.34 × 12,889.89
4. Step 4: Simplify right side
   31,633.47x = 611,165,627.02
5. Step 5: Solve for x
   x = 611,165,627.02/31,633.47
6. Step 6: Final answer
   x = 19,320.22