Finding the Fourth Proportional to 2,015.77, 2,999.27 and 1,965.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.77 : 2,999.27 = 1,965.55 : x
2. Step 2: Convert to fraction form
   2,015.77/2,999.27 = 1,965.55/x
3. Step 3: Cross multiply
   2,015.77x = 2,999.27 × 1,965.55
4. Step 4: Simplify right side
   2,015.77x = 5,895,215.15
5. Step 5: Solve for x
   x = 5,895,215.15/2,015.77
6. Step 6: Final answer
   x = 2,924.55