Finding the Fourth Proportional to 2,521.46, 3,479.98 and 1,578.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.46 : 3,479.98 = 1,578.20 : x
2. Step 2: Convert to fraction form
   2,521.46/3,479.98 = 1,578.20/x
3. Step 3: Cross multiply
   2,521.46x = 3,479.98 × 1,578.20
4. Step 4: Simplify right side
   2,521.46x = 5,492,104.44
5. Step 5: Solve for x
   x = 5,492,104.44/2,521.46
6. Step 6: Final answer
   x = 2,178.14