Finding the Fourth Proportional to 2,279.76, 3,419.71 and 719.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.76 : 3,419.71 = 719.78 : x
2. Step 2: Convert to fraction form
   2,279.76/3,419.71 = 719.78/x
3. Step 3: Cross multiply
   2,279.76x = 3,419.71 × 719.78
4. Step 4: Simplify right side
   2,279.76x = 2,461,438.86
5. Step 5: Solve for x
   x = 2,461,438.86/2,279.76
6. Step 6: Final answer
   x = 1,079.69