Finding the Fourth Proportional to 31,003.02, 42,784.47 and 16,855.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.02 : 42,784.47 = 16,855.83 : x
2. Step 2: Convert to fraction form
   31,003.02/42,784.47 = 16,855.83/x
3. Step 3: Cross multiply
   31,003.02x = 42,784.47 × 16,855.83
4. Step 4: Simplify right side
   31,003.02x = 721,167,752.96
5. Step 5: Solve for x
   x = 721,167,752.96/31,003.02
6. Step 6: Final answer
   x = 23,261.21