Finding the Fourth Proportional to 1,184.72, 1,634.81 and 687.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,184.72 : 1,634.81 = 687.25 : x
2. Step 2: Convert to fraction form
   1,184.72/1,634.81 = 687.25/x
3. Step 3: Cross multiply
   1,184.72x = 1,634.81 × 687.25
4. Step 4: Simplify right side
   1,184.72x = 1,123,515.65
5. Step 5: Solve for x
   x = 1,123,515.65/1,184.72
6. Step 6: Final answer
   x = 948.34