Finding the Fourth Proportional to 31,002.48, 42,783.38 and 16,855.44

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002.48 : 42,783.38 = 16,855.44 : x
2. Step 2: Convert to fraction form
   31,002.48/42,783.38 = 16,855.44/x
3. Step 3: Cross multiply
   31,002.48x = 42,783.38 × 16,855.44
4. Step 4: Simplify right side
   31,002.48x = 721,132,694.59
5. Step 5: Solve for x
   x = 721,132,694.59/31,002.48
6. Step 6: Final answer
   x = 23,260.48