Finding the Fourth Proportional to 2,086.61, 3,116.00 and 1,965.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.61 : 3,116.00 = 1,965.11 : x
2. Step 2: Convert to fraction form
   2,086.61/3,116.00 = 1,965.11/x
3. Step 3: Cross multiply
   2,086.61x = 3,116.00 × 1,965.11
4. Step 4: Simplify right side
   2,086.61x = 6,123,272.09
5. Step 5: Solve for x
   x = 6,123,272.09/2,086.61
6. Step 6: Final answer
   x = 2,934.56