Finding the Fourth Proportional to 2,479.28, 3,721.62 and 1,310.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.28 : 3,721.62 = 1,310.72 : x
2. Step 2: Convert to fraction form
   2,479.28/3,721.62 = 1,310.72/x
3. Step 3: Cross multiply
   2,479.28x = 3,721.62 × 1,310.72
4. Step 4: Simplify right side
   2,479.28x = 4,878,001.77
5. Step 5: Solve for x
   x = 4,878,001.77/2,479.28
6. Step 6: Final answer
   x = 1,967.51