Finding the Fourth Proportional to 1,185.05, 1,635.52 and 687.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.05 : 1,635.52 = 687.59 : x
2. Step 2: Convert to fraction form
   1,185.05/1,635.52 = 687.59/x
3. Step 3: Cross multiply
   1,185.05x = 1,635.52 × 687.59
4. Step 4: Simplify right side
   1,185.05x = 1,124,559.02
5. Step 5: Solve for x
   x = 1,124,559.02/1,185.05
6. Step 6: Final answer
   x = 948.95