Finding the Fourth Proportional to 1,687.50, 2,328.75 and 1,067.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.50 : 2,328.75 = 1,067.34 : x
2. Step 2: Convert to fraction form
   1,687.50/2,328.75 = 1,067.34/x
3. Step 3: Cross multiply
   1,687.50x = 2,328.75 × 1,067.34
4. Step 4: Simplify right side
   1,687.50x = 2,485,568.03
5. Step 5: Solve for x
   x = 2,485,568.03/1,687.50
6. Step 6: Final answer
   x = 1,472.93