Finding the Fourth Proportional to 1,081.66, 1,492.78 and 662.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.66 : 1,492.78 = 662.10 : x
2. Step 2: Convert to fraction form
   1,081.66/1,492.78 = 662.10/x
3. Step 3: Cross multiply
   1,081.66x = 1,492.78 × 662.10
4. Step 4: Simplify right side
   1,081.66x = 988,369.64
5. Step 5: Solve for x
   x = 988,369.64/1,081.66
6. Step 6: Final answer
   x = 913.75