Finding the Fourth Proportional to 2,478.72, 3,718.16 and 747.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.72 : 3,718.16 = 747.34 : x
2. Step 2: Convert to fraction form
   2,478.72/3,718.16 = 747.34/x
3. Step 3: Cross multiply
   2,478.72x = 3,718.16 × 747.34
4. Step 4: Simplify right side
   2,478.72x = 2,778,729.69
5. Step 5: Solve for x
   x = 2,778,729.69/2,478.72
6. Step 6: Final answer
   x = 1,121.03