Finding the Fourth Proportional to 31,056.82, 42,858.51 and 16,909.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.82 : 42,858.51 = 16,909.75 : x
2. Step 2: Convert to fraction form
   31,056.82/42,858.51 = 16,909.75/x
3. Step 3: Cross multiply
   31,056.82x = 42,858.51 × 16,909.75
4. Step 4: Simplify right side
   31,056.82x = 724,726,689.47
5. Step 5: Solve for x
   x = 724,726,689.47/31,056.82
6. Step 6: Final answer
   x = 23,335.51