Finding the Fourth Proportional to 3,498.40, 5,242.74 and 3,393.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498.40 : 5,242.74 = 3,393.28 : x
2. Step 2: Convert to fraction form
   3,498.40/5,242.74 = 3,393.28/x
3. Step 3: Cross multiply
   3,498.40x = 5,242.74 × 3,393.28
4. Step 4: Simplify right side
   3,498.40x = 17,790,084.79
5. Step 5: Solve for x
   x = 17,790,084.79/3,498.40
6. Step 6: Final answer
   x = 5,085.21