Finding the Fourth Proportional to 1,411.55, 2,113.90 and 716.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.55 : 2,113.90 = 716.39 : x
2. Step 2: Convert to fraction form
   1,411.55/2,113.90 = 716.39/x
3. Step 3: Cross multiply
   1,411.55x = 2,113.90 × 716.39
4. Step 4: Simplify right side
   1,411.55x = 1,514,376.82
5. Step 5: Solve for x
   x = 1,514,376.82/1,411.55
6. Step 6: Final answer
   x = 1,072.85