Finding the Fourth Proportional to 23,897.36, 32,978.28 and 13,287

Step by Step Solution

1. Step 1: Write the proportion equation
   23,897.36 : 32,978.28 = 13,287 : x
2. Step 2: Convert to fraction form
   23,897.36/32,978.28 = 13,287/x
3. Step 3: Cross multiply
   23,897.36x = 32,978.28 × 13,287
4. Step 4: Simplify right side
   23,897.36x = 438,182,406.36
5. Step 5: Solve for x
   x = 438,182,406.36/23,897.36
6. Step 6: Final answer
   x = 18,336.02