Finding the Fourth Proportional to 1,078.01, 1,612.91 and 666.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.01 : 1,612.91 = 666.12 : x
2. Step 2: Convert to fraction form
   1,078.01/1,612.91 = 666.12/x
3. Step 3: Cross multiply
   1,078.01x = 1,612.91 × 666.12
4. Step 4: Simplify right side
   1,078.01x = 1,074,399.32
5. Step 5: Solve for x
   x = 1,074,399.32/1,078.01
6. Step 6: Final answer
   x = 996.65