Finding the Fourth Proportional to 2,079.71, 2,869.50 and 1,240.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.71 : 2,869.50 = 1,240.72 : x
2. Step 2: Convert to fraction form
   2,079.71/2,869.50 = 1,240.72/x
3. Step 3: Cross multiply
   2,079.71x = 2,869.50 × 1,240.72
4. Step 4: Simplify right side
   2,079.71x = 3,560,225.49
5. Step 5: Solve for x
   x = 3,560,225.49/2,079.71
6. Step 6: Final answer
   x = 1,711.89