Finding the Fourth Proportional to 1,131.72, 1,560.98 and 984.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.72 : 1,560.98 = 984.11 : x
2. Step 2: Convert to fraction form
   1,131.72/1,560.98 = 984.11/x
3. Step 3: Cross multiply
   1,131.72x = 1,560.98 × 984.11
4. Step 4: Simplify right side
   1,131.72x = 1,536,163.30
5. Step 5: Solve for x
   x = 1,536,163.30/1,131.72
6. Step 6: Final answer
   x = 1,357.37