Finding the Fourth Proportional to 2,479.56, 3,718.86 and 747.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.56 : 3,718.86 = 747.78 : x
2. Step 2: Convert to fraction form
   2,479.56/3,718.86 = 747.78/x
3. Step 3: Cross multiply
   2,479.56x = 3,718.86 × 747.78
4. Step 4: Simplify right side
   2,479.56x = 2,780,889.13
5. Step 5: Solve for x
   x = 2,780,889.13/2,479.56
6. Step 6: Final answer
   x = 1,121.53