Finding the Fourth Proportional to 2,079.59, 2,869.14 and 1,371.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.59 : 2,869.14 = 1,371.78 : x
2. Step 2: Convert to fraction form
   2,079.59/2,869.14 = 1,371.78/x
3. Step 3: Cross multiply
   2,079.59x = 2,869.14 × 1,371.78
4. Step 4: Simplify right side
   2,079.59x = 3,935,840.15
5. Step 5: Solve for x
   x = 3,935,840.15/2,079.59
6. Step 6: Final answer
   x = 1,892.61