Finding the Fourth Proportional to 1,411.43, 2,118.45 and 718.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.43 : 2,118.45 = 718.59 : x
2. Step 2: Convert to fraction form
   1,411.43/2,118.45 = 718.59/x
3. Step 3: Cross multiply
   1,411.43x = 2,118.45 × 718.59
4. Step 4: Simplify right side
   1,411.43x = 1,522,301.56
5. Step 5: Solve for x
   x = 1,522,301.56/1,411.43
6. Step 6: Final answer
   x = 1,078.55