Finding the Fourth Proportional to 1,081.16, 1,490.46 and 766.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.16 : 1,490.46 = 766.16 : x
2. Step 2: Convert to fraction form
   1,081.16/1,490.46 = 766.16/x
3. Step 3: Cross multiply
   1,081.16x = 1,490.46 × 766.16
4. Step 4: Simplify right side
   1,081.16x = 1,141,930.83
5. Step 5: Solve for x
   x = 1,141,930.83/1,081.16
6. Step 6: Final answer
   x = 1,056.21