Finding the Fourth Proportional to 23,868.78, 32,939.91 and 13,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,868.78 : 32,939.91 = 13,258.50 : x
2. Step 2: Convert to fraction form
   23,868.78/32,939.91 = 13,258.50/x
3. Step 3: Cross multiply
   23,868.78x = 32,939.91 × 13,258.50
4. Step 4: Simplify right side
   23,868.78x = 436,733,796.74
5. Step 5: Solve for x
   x = 436,733,796.74/23,868.78
6. Step 6: Final answer
   x = 18,297.28