Finding the Fourth Proportional to 1,156.72, 1,735.94 and 724.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156.72 : 1,735.94 = 724.16 : x
2. Step 2: Convert to fraction form
   1,156.72/1,735.94 = 724.16/x
3. Step 3: Cross multiply
   1,156.72x = 1,735.94 × 724.16
4. Step 4: Simplify right side
   1,156.72x = 1,257,098.31
5. Step 5: Solve for x
   x = 1,257,098.31/1,156.72
6. Step 6: Final answer
   x = 1,086.78