Finding the Fourth Proportional to 1,316.72, 1,974.50 and 494.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.72 : 1,974.50 = 494.42 : x
2. Step 2: Convert to fraction form
   1,316.72/1,974.50 = 494.42/x
3. Step 3: Cross multiply
   1,316.72x = 1,974.50 × 494.42
4. Step 4: Simplify right side
   1,316.72x = 976,238.46
5. Step 5: Solve for x
   x = 976,238.46/1,316.72
6. Step 6: Final answer
   x = 741.42