Finding the Fourth Proportional to 31,003.75, 42,784.97 and 16,856.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.75 : 42,784.97 = 16,856.49 : x
2. Step 2: Convert to fraction form
   31,003.75/42,784.97 = 16,856.49/x
3. Step 3: Cross multiply
   31,003.75x = 42,784.97 × 16,856.49
4. Step 4: Simplify right side
   31,003.75x = 721,204,418.96
5. Step 5: Solve for x
   x = 721,204,418.96/31,003.75
6. Step 6: Final answer
   x = 23,261.84