Finding the Fourth Proportional to 16,693.50, 23,036.85 and 9,139.74

Step by Step Solution

1. Step 1: Write the proportion equation
   16,693.50 : 23,036.85 = 9,139.74 : x
2. Step 2: Convert to fraction form
   16,693.50/23,036.85 = 9,139.74/x
3. Step 3: Cross multiply
   16,693.50x = 23,036.85 × 9,139.74
4. Step 4: Simplify right side
   16,693.50x = 210,550,819.42
5. Step 5: Solve for x
   x = 210,550,819.42/16,693.50
6. Step 6: Final answer
   x = 12,612.74