Finding the Fourth Proportional to 16,978.68, 23,430.66 and 9,424.52

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.68 : 23,430.66 = 9,424.52 : x
2. Step 2: Convert to fraction form
   16,978.68/23,430.66 = 9,424.52/x
3. Step 3: Cross multiply
   16,978.68x = 23,430.66 × 9,424.52
4. Step 4: Simplify right side
   16,978.68x = 220,822,723.78
5. Step 5: Solve for x
   x = 220,822,723.78/16,978.68
6. Step 6: Final answer
   x = 13,005.88