Finding the Fourth Proportional to 2,521.43, 3,479.62 and 1,387.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.43 : 3,479.62 = 1,387.15 : x
2. Step 2: Convert to fraction form
   2,521.43/3,479.62 = 1,387.15/x
3. Step 3: Cross multiply
   2,521.43x = 3,479.62 × 1,387.15
4. Step 4: Simplify right side
   2,521.43x = 4,826,742.72
5. Step 5: Solve for x
   x = 4,826,742.72/2,521.43
6. Step 6: Final answer
   x = 1,914.29