Finding the Fourth Proportional to 1,150.50, 1,587.28 and 772.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.50 : 1,587.28 = 772.48 : x
2. Step 2: Convert to fraction form
   1,150.50/1,587.28 = 772.48/x
3. Step 3: Cross multiply
   1,150.50x = 1,587.28 × 772.48
4. Step 4: Simplify right side
   1,150.50x = 1,226,142.05
5. Step 5: Solve for x
   x = 1,226,142.05/1,150.50
6. Step 6: Final answer
   x = 1,065.75