Finding the Fourth Proportional to 1,223.50, 1,688.52 and 758.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.50 : 1,688.52 = 758.02 : x
2. Step 2: Convert to fraction form
   1,223.50/1,688.52 = 758.02/x
3. Step 3: Cross multiply
   1,223.50x = 1,688.52 × 758.02
4. Step 4: Simplify right side
   1,223.50x = 1,279,931.93
5. Step 5: Solve for x
   x = 1,279,931.93/1,223.50
6. Step 6: Final answer
   x = 1,046.12