Finding the Fourth Proportional to 1,417.89, 2,127.78 and 687.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.89 : 2,127.78 = 687.52 : x
2. Step 2: Convert to fraction form
   1,417.89/2,127.78 = 687.52/x
3. Step 3: Cross multiply
   1,417.89x = 2,127.78 × 687.52
4. Step 4: Simplify right side
   1,417.89x = 1,462,891.31
5. Step 5: Solve for x
   x = 1,462,891.31/1,417.89
6. Step 6: Final answer
   x = 1,031.74