Finding the Fourth Proportional to 1,150.80, 1,587.30 and 1,112.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.80 : 1,587.30 = 1,112.70 : x
2. Step 2: Convert to fraction form
   1,150.80/1,587.30 = 1,112.70/x
3. Step 3: Cross multiply
   1,150.80x = 1,587.30 × 1,112.70
4. Step 4: Simplify right side
   1,150.80x = 1,766,188.71
5. Step 5: Solve for x
   x = 1,766,188.71/1,150.80
6. Step 6: Final answer
   x = 1,534.75