Finding the Fourth Proportional to 1,131.56, 1,560.57 and 738.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.56 : 1,560.57 = 738.71 : x
2. Step 2: Convert to fraction form
   1,131.56/1,560.57 = 738.71/x
3. Step 3: Cross multiply
   1,131.56x = 1,560.57 × 738.71
4. Step 4: Simplify right side
   1,131.56x = 1,152,808.66
5. Step 5: Solve for x
   x = 1,152,808.66/1,131.56
6. Step 6: Final answer
   x = 1,018.78