Finding the Fourth Proportional to 1,131.71, 1,560.74 and 1,015.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.71 : 1,560.74 = 1,015.52 : x
2. Step 2: Convert to fraction form
   1,131.71/1,560.74 = 1,015.52/x
3. Step 3: Cross multiply
   1,131.71x = 1,560.74 × 1,015.52
4. Step 4: Simplify right side
   1,131.71x = 1,584,949.80
5. Step 5: Solve for x
   x = 1,584,949.80/1,131.71
6. Step 6: Final answer
   x = 1,400.50