Finding the Fourth Proportional to 23,896.72, 32,978.64 and 13,286.13

Step by Step Solution

1. Step 1: Write the proportion equation
   23,896.72 : 32,978.64 = 13,286.13 : x
2. Step 2: Convert to fraction form
   23,896.72/32,978.64 = 13,286.13/x
3. Step 3: Cross multiply
   23,896.72x = 32,978.64 × 13,286.13
4. Step 4: Simplify right side
   23,896.72x = 438,158,498.26
5. Step 5: Solve for x
   x = 438,158,498.26/23,896.72
6. Step 6: Final answer
   x = 18,335.51