Finding the Fourth Proportional to 2,071.71, 3,108.32 and 961.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.71 : 3,108.32 = 961.65 : x
2. Step 2: Convert to fraction form
   2,071.71/3,108.32 = 961.65/x
3. Step 3: Cross multiply
   2,071.71x = 3,108.32 × 961.65
4. Step 4: Simplify right side
   2,071.71x = 2,989,111.12
5. Step 5: Solve for x
   x = 2,989,111.12/2,071.71
6. Step 6: Final answer
   x = 1,442.83