Finding the Fourth Proportional to 2,214.52, 3,315.34 and 1,287.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,214.52 : 3,315.34 = 1,287.25 : x
2. Step 2: Convert to fraction form
   2,214.52/3,315.34 = 1,287.25/x
3. Step 3: Cross multiply
   2,214.52x = 3,315.34 × 1,287.25
4. Step 4: Simplify right side
   2,214.52x = 4,267,664.74
5. Step 5: Solve for x
   x = 4,267,664.74/2,214.52
6. Step 6: Final answer
   x = 1,927.13