Finding the Fourth Proportional to 1,081.59, 1,491.98 and 731.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.59 : 1,491.98 = 731.67 : x
2. Step 2: Convert to fraction form
   1,081.59/1,491.98 = 731.67/x
3. Step 3: Cross multiply
   1,081.59x = 1,491.98 × 731.67
4. Step 4: Simplify right side
   1,081.59x = 1,091,637.01
5. Step 5: Solve for x
   x = 1,091,637.01/1,081.59
6. Step 6: Final answer
   x = 1,009.29