Finding the Fourth Proportional to 31,046.25, 42,843.83 and 16,899.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,046.25 : 42,843.83 = 16,899.20 : x
2. Step 2: Convert to fraction form
   31,046.25/42,843.83 = 16,899.20/x
3. Step 3: Cross multiply
   31,046.25x = 42,843.83 × 16,899.20
4. Step 4: Simplify right side
   31,046.25x = 724,026,153.22
5. Step 5: Solve for x
   x = 724,026,153.22/31,046.25
6. Step 6: Final answer
   x = 23,320.89