Finding the Fourth Proportional to 1,986.78, 2,965.16 and 1,934.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.78 : 2,965.16 = 1,934.94 : x
2. Step 2: Convert to fraction form
   1,986.78/2,965.16 = 1,934.94/x
3. Step 3: Cross multiply
   1,986.78x = 2,965.16 × 1,934.94
4. Step 4: Simplify right side
   1,986.78x = 5,737,397.02
5. Step 5: Solve for x
   x = 5,737,397.02/1,986.78
6. Step 6: Final answer
   x = 2,887.79