Finding the Fourth Proportional to 1,411.25, 2,115.61 and 717.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.25 : 2,115.61 = 717.53 : x
2. Step 2: Convert to fraction form
   1,411.25/2,115.61 = 717.53/x
3. Step 3: Cross multiply
   1,411.25x = 2,115.61 × 717.53
4. Step 4: Simplify right side
   1,411.25x = 1,518,001.27
5. Step 5: Solve for x
   x = 1,518,001.27/1,411.25
6. Step 6: Final answer
   x = 1,075.65