Finding the Fourth Proportional to 1,185.96, 1,635.93 and 688.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.96 : 1,635.93 = 688.52 : x
2. Step 2: Convert to fraction form
   1,185.96/1,635.93 = 688.52/x
3. Step 3: Cross multiply
   1,185.96x = 1,635.93 × 688.52
4. Step 4: Simplify right side
   1,185.96x = 1,126,370.52
5. Step 5: Solve for x
   x = 1,126,370.52/1,185.96
6. Step 6: Final answer
   x = 949.75