Finding the Fourth Proportional to 3,488.24, 5,223.72 and 2,388.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,488.24 : 5,223.72 = 2,388.80 : x
2. Step 2: Convert to fraction form
   3,488.24/5,223.72 = 2,388.80/x
3. Step 3: Cross multiply
   3,488.24x = 5,223.72 × 2,388.80
4. Step 4: Simplify right side
   3,488.24x = 12,478,422.34
5. Step 5: Solve for x
   x = 12,478,422.34/3,488.24
6. Step 6: Final answer
   x = 3,577.28