Finding the Fourth Proportional to 1,687.36, 2,326.72 and 1,096.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.36 : 2,326.72 = 1,096.80 : x
2. Step 2: Convert to fraction form
   1,687.36/2,326.72 = 1,096.80/x
3. Step 3: Cross multiply
   1,687.36x = 2,326.72 × 1,096.80
4. Step 4: Simplify right side
   1,687.36x = 2,551,946.50
5. Step 5: Solve for x
   x = 2,551,946.50/1,687.36
6. Step 6: Final answer
   x = 1,512.39