Finding the Fourth Proportional to 1,264.46, 1,744.35 and 1,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,264.46 : 1,744.35 = 1,089.50 : x
2. Step 2: Convert to fraction form
   1,264.46/1,744.35 = 1,089.50/x
3. Step 3: Cross multiply
   1,264.46x = 1,744.35 × 1,089.50
4. Step 4: Simplify right side
   1,264.46x = 1,900,469.33
5. Step 5: Solve for x
   x = 1,900,469.33/1,264.46
6. Step 6: Final answer
   x = 1,502.99