Finding the Fourth Proportional to 2,079.27, 3,117.75 and 691.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.27 : 3,117.75 = 691.86 : x
2. Step 2: Convert to fraction form
   2,079.27/3,117.75 = 691.86/x
3. Step 3: Cross multiply
   2,079.27x = 3,117.75 × 691.86
4. Step 4: Simplify right side
   2,079.27x = 2,157,055.61
5. Step 5: Solve for x
   x = 2,157,055.61/2,079.27
6. Step 6: Final answer
   x = 1,037.41