Finding the Fourth Proportional to 31,056.52, 42,858.18 and 16,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.52 : 42,858.18 = 16,909.50 : x
2. Step 2: Convert to fraction form
   31,056.52/42,858.18 = 16,909.50/x
3. Step 3: Cross multiply
   31,056.52x = 42,858.18 × 16,909.50
4. Step 4: Simplify right side
   31,056.52x = 724,710,394.71
5. Step 5: Solve for x
   x = 724,710,394.71/31,056.52
6. Step 6: Final answer
   x = 23,335.21