Finding the Fourth Proportional to 2,078.01, 3,116.71 and 691.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.01 : 3,116.71 = 691.32 : x
2. Step 2: Convert to fraction form
   2,078.01/3,116.71 = 691.32/x
3. Step 3: Cross multiply
   2,078.01x = 3,116.71 × 691.32
4. Step 4: Simplify right side
   2,078.01x = 2,154,624.92
5. Step 5: Solve for x
   x = 2,154,624.92/2,078.01
6. Step 6: Final answer
   x = 1,036.87