Finding the Fourth Proportional to 31,028.86, 42,819.79 and 16,881.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.86 : 42,819.79 = 16,881.60 : x
2. Step 2: Convert to fraction form
   31,028.86/42,819.79 = 16,881.60/x
3. Step 3: Cross multiply
   31,028.86x = 42,819.79 × 16,881.60
4. Step 4: Simplify right side
   31,028.86x = 722,866,482.46
5. Step 5: Solve for x
   x = 722,866,482.46/31,028.86
6. Step 6: Final answer
   x = 23,296.59