Finding the Fourth Proportional to 23,898.38, 32,978.96 and 13,287.80

Step by Step Solution

1. Step 1: Write the proportion equation
   23,898.38 : 32,978.96 = 13,287.80 : x
2. Step 2: Convert to fraction form
   23,898.38/32,978.96 = 13,287.80/x
3. Step 3: Cross multiply
   23,898.38x = 32,978.96 × 13,287.80
4. Step 4: Simplify right side
   23,898.38x = 438,217,824.69
5. Step 5: Solve for x
   x = 438,217,824.69/23,898.38
6. Step 6: Final answer
   x = 18,336.72