Finding the Fourth Proportional to 31,748.60, 47,562.42 and 19,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,748.60 : 47,562.42 = 19,721.72 : x
2. Step 2: Convert to fraction form
   31,748.60/47,562.42 = 19,721.72/x
3. Step 3: Cross multiply
   31,748.60x = 47,562.42 × 19,721.72
4. Step 4: Simplify right side
   31,748.60x = 938,012,729.76
5. Step 5: Solve for x
   x = 938,012,729.76/31,748.60
6. Step 6: Final answer
   x = 29,545.01