Finding the Fourth Proportional to 23,897.60, 32,978.72 and 13,288.32

Step by Step Solution

1. Step 1: Write the proportion equation
   23,897.60 : 32,978.72 = 13,288.32 : x
2. Step 2: Convert to fraction form
   23,897.60/32,978.72 = 13,288.32/x
3. Step 3: Cross multiply
   23,897.60x = 32,978.72 × 13,288.32
4. Step 4: Simplify right side
   23,897.60x = 438,231,784.55
5. Step 5: Solve for x
   x = 438,231,784.55/23,897.60
6. Step 6: Final answer
   x = 18,337.90