Finding the Fourth Proportional to 1,111.39, 1,666.60 and 494.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.39 : 1,666.60 = 494.67 : x
2. Step 2: Convert to fraction form
   1,111.39/1,666.60 = 494.67/x
3. Step 3: Cross multiply
   1,111.39x = 1,666.60 × 494.67
4. Step 4: Simplify right side
   1,111.39x = 824,417.02
5. Step 5: Solve for x
   x = 824,417.02/1,111.39
6. Step 6: Final answer
   x = 741.79