Finding the Fourth Proportional to 1,784.10, 2,689.52 and 1,665.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.10 : 2,689.52 = 1,665.17 : x
2. Step 2: Convert to fraction form
   1,784.10/2,689.52 = 1,665.17/x
3. Step 3: Cross multiply
   1,784.10x = 2,689.52 × 1,665.17
4. Step 4: Simplify right side
   1,784.10x = 4,478,498.73
5. Step 5: Solve for x
   x = 4,478,498.73/1,784.10
6. Step 6: Final answer
   x = 2,510.23