Finding the Fourth Proportional to 31,003.48, 42,784.76 and 16,856.44

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.48 : 42,784.76 = 16,856.44 : x
2. Step 2: Convert to fraction form
   31,003.48/42,784.76 = 16,856.44/x
3. Step 3: Cross multiply
   31,003.48x = 42,784.76 × 16,856.44
4. Step 4: Simplify right side
   31,003.48x = 721,198,739.85
5. Step 5: Solve for x
   x = 721,198,739.85/31,003.48
6. Step 6: Final answer
   x = 23,261.86