Finding the Fourth Proportional to 2,016.21, 2,999.92 and 1,965.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.21 : 2,999.92 = 1,965.99 : x
2. Step 2: Convert to fraction form
   2,016.21/2,999.92 = 1,965.99/x
3. Step 3: Cross multiply
   2,016.21x = 2,999.92 × 1,965.99
4. Step 4: Simplify right side
   2,016.21x = 5,897,812.72
5. Step 5: Solve for x
   x = 5,897,812.72/2,016.21
6. Step 6: Final answer
   x = 2,925.20