Finding the Fourth Proportional to 2,015.19, 3,015.50 and 1,665.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.19 : 3,015.50 = 1,665.27 : x
2. Step 2: Convert to fraction form
   2,015.19/3,015.50 = 1,665.27/x
3. Step 3: Cross multiply
   2,015.19x = 3,015.50 × 1,665.27
4. Step 4: Simplify right side
   2,015.19x = 5,021,613.36
5. Step 5: Solve for x
   x = 5,021,613.36/2,015.19
6. Step 6: Final answer
   x = 2,491.88