Finding the Fourth Proportional to 2,498.40, 3,445.20 and 1,612.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,498.40 : 3,445.20 = 1,612.80 : x
2. Step 2: Convert to fraction form
   2,498.40/3,445.20 = 1,612.80/x
3. Step 3: Cross multiply
   2,498.40x = 3,445.20 × 1,612.80
4. Step 4: Simplify right side
   2,498.40x = 5,556,418.56
5. Step 5: Solve for x
   x = 5,556,418.56/2,498.40
6. Step 6: Final answer
   x = 2,223.99