Finding the Fourth Proportional to 16,980.12, 23,432.76 and 9,426.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,980.12 : 23,432.76 = 9,426.60 : x
2. Step 2: Convert to fraction form
   16,980.12/23,432.76 = 9,426.60/x
3. Step 3: Cross multiply
   16,980.12x = 23,432.76 × 9,426.60
4. Step 4: Simplify right side
   16,980.12x = 220,891,255.42
5. Step 5: Solve for x
   x = 220,891,255.42/16,980.12
6. Step 6: Final answer
   x = 13,008.82