Finding the Fourth Proportional to 1,100.32, 1,648.62 and 666.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.32 : 1,648.62 = 666.56 : x
2. Step 2: Convert to fraction form
   1,100.32/1,648.62 = 666.56/x
3. Step 3: Cross multiply
   1,100.32x = 1,648.62 × 666.56
4. Step 4: Simplify right side
   1,100.32x = 1,098,908.27
5. Step 5: Solve for x
   x = 1,098,908.27/1,100.32
6. Step 6: Final answer
   x = 998.72