Finding the Fourth Proportional to 1,111.30, 1,665.62 and 493.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.30 : 1,665.62 = 493.68 : x
2. Step 2: Convert to fraction form
   1,111.30/1,665.62 = 493.68/x
3. Step 3: Cross multiply
   1,111.30x = 1,665.62 × 493.68
4. Step 4: Simplify right side
   1,111.30x = 822,283.28
5. Step 5: Solve for x
   x = 822,283.28/1,111.30
6. Step 6: Final answer
   x = 739.93