Finding the Fourth Proportional to 21,494.78, 32,248.58 and 10,258.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,494.78 : 32,248.58 = 10,258.55 : x
2. Step 2: Convert to fraction form
   21,494.78/32,248.58 = 10,258.55/x
3. Step 3: Cross multiply
   21,494.78x = 32,248.58 × 10,258.55
4. Step 4: Simplify right side
   21,494.78x = 330,823,760.15
5. Step 5: Solve for x
   x = 330,823,760.15/21,494.78
6. Step 6: Final answer
   x = 15,390.89