Finding the Fourth Proportional to 1,687.31, 2,527.32 and 1,101.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.31 : 2,527.32 = 1,101.68 : x
2. Step 2: Convert to fraction form
   1,687.31/2,527.32 = 1,101.68/x
3. Step 3: Cross multiply
   1,687.31x = 2,527.32 × 1,101.68
4. Step 4: Simplify right side
   1,687.31x = 2,784,297.90
5. Step 5: Solve for x
   x = 2,784,297.90/1,687.31
6. Step 6: Final answer
   x = 1,650.14