Finding the Fourth Proportional to 31,046.61, 42,844.50 and 16,899.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,046.61 : 42,844.50 = 16,899.42 : x
2. Step 2: Convert to fraction form
   31,046.61/42,844.50 = 16,899.42/x
3. Step 3: Cross multiply
   31,046.61x = 42,844.50 × 16,899.42
4. Step 4: Simplify right side
   31,046.61x = 724,047,200.19
5. Step 5: Solve for x
   x = 724,047,200.19/31,046.61
6. Step 6: Final answer
   x = 23,321.30