Finding the Fourth Proportional to 1,081.62, 1,491.86 and 662.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.62 : 1,491.86 = 662.06 : x
2. Step 2: Convert to fraction form
   1,081.62/1,491.86 = 662.06/x
3. Step 3: Cross multiply
   1,081.62x = 1,491.86 × 662.06
4. Step 4: Simplify right side
   1,081.62x = 987,706.22
5. Step 5: Solve for x
   x = 987,706.22/1,081.62
6. Step 6: Final answer
   x = 913.17