Finding the Fourth Proportional to 2,279.63, 3,419.79 and 719.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.63 : 3,419.79 = 719.47 : x
2. Step 2: Convert to fraction form
   2,279.63/3,419.79 = 719.47/x
3. Step 3: Cross multiply
   2,279.63x = 3,419.79 × 719.47
4. Step 4: Simplify right side
   2,279.63x = 2,460,436.31
5. Step 5: Solve for x
   x = 2,460,436.31/2,279.63
6. Step 6: Final answer
   x = 1,079.31