Finding the Fourth Proportional to 31,028.34, 42,819.21 and 16,881.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.34 : 42,819.21 = 16,881.18 : x
2. Step 2: Convert to fraction form
   31,028.34/42,819.21 = 16,881.18/x
3. Step 3: Cross multiply
   31,028.34x = 42,819.21 × 16,881.18
4. Step 4: Simplify right side
   31,028.34x = 722,838,791.47
5. Step 5: Solve for x
   x = 722,838,791.47/31,028.34
6. Step 6: Final answer
   x = 23,296.08