Finding the Fourth Proportional to 2,079.64, 3,117.82 and 1,039.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.64 : 3,117.82 = 1,039.10 : x
2. Step 2: Convert to fraction form
   2,079.64/3,117.82 = 1,039.10/x
3. Step 3: Cross multiply
   2,079.64x = 3,117.82 × 1,039.10
4. Step 4: Simplify right side
   2,079.64x = 3,239,726.76
5. Step 5: Solve for x
   x = 3,239,726.76/2,079.64
6. Step 6: Final answer
   x = 1,557.83