Finding the Fourth Proportional to 12,258.28, 18,388.50 and 3,493

Step by Step Solution

1. Step 1: Write the proportion equation
   12,258.28 : 18,388.50 = 3,493 : x
2. Step 2: Convert to fraction form
   12,258.28/18,388.50 = 3,493/x
3. Step 3: Cross multiply
   12,258.28x = 18,388.50 × 3,493
4. Step 4: Simplify right side
   12,258.28x = 64,231,030.50
5. Step 5: Solve for x
   x = 64,231,030.50/12,258.28
6. Step 6: Final answer
   x = 5,239.81