Finding the Fourth Proportional to 2,479.86, 3,719.88 and 748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.86 : 3,719.88 = 748.50 : x
2. Step 2: Convert to fraction form
   2,479.86/3,719.88 = 748.50/x
3. Step 3: Cross multiply
   2,479.86x = 3,719.88 × 748.50
4. Step 4: Simplify right side
   2,479.86x = 2,784,330.18
5. Step 5: Solve for x
   x = 2,784,330.18/2,479.86
6. Step 6: Final answer
   x = 1,122.78