Finding the Fourth Proportional to 1,111.59, 1,666.53 and 495.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.59 : 1,666.53 = 495.09 : x
2. Step 2: Convert to fraction form
   1,111.59/1,666.53 = 495.09/x
3. Step 3: Cross multiply
   1,111.59x = 1,666.53 × 495.09
4. Step 4: Simplify right side
   1,111.59x = 825,082.34
5. Step 5: Solve for x
   x = 825,082.34/1,111.59
6. Step 6: Final answer
   x = 742.25