Finding the Fourth Proportional to 1,872.69, 2,585.43 and 1,665.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.69 : 2,585.43 = 1,665.12 : x
2. Step 2: Convert to fraction form
   1,872.69/2,585.43 = 1,665.12/x
3. Step 3: Cross multiply
   1,872.69x = 2,585.43 × 1,665.12
4. Step 4: Simplify right side
   1,872.69x = 4,305,051.20
5. Step 5: Solve for x
   x = 4,305,051.20/1,872.69
6. Step 6: Final answer
   x = 2,298.86