Finding the Fourth Proportional to 1,687.10, 2,328.59 and 1,096.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.10 : 2,328.59 = 1,096.61 : x
2. Step 2: Convert to fraction form
   1,687.10/2,328.59 = 1,096.61/x
3. Step 3: Cross multiply
   1,687.10x = 2,328.59 × 1,096.61
4. Step 4: Simplify right side
   1,687.10x = 2,553,558.12
5. Step 5: Solve for x
   x = 2,553,558.12/1,687.10
6. Step 6: Final answer
   x = 1,513.58