Finding the Fourth Proportional to 1,184.56, 1,635.03 and 687.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,184.56 : 1,635.03 = 687.31 : x
2. Step 2: Convert to fraction form
   1,184.56/1,635.03 = 687.31/x
3. Step 3: Cross multiply
   1,184.56x = 1,635.03 × 687.31
4. Step 4: Simplify right side
   1,184.56x = 1,123,764.29
5. Step 5: Solve for x
   x = 1,123,764.29/1,184.56
6. Step 6: Final answer
   x = 948.68