Finding the Fourth Proportional to 1,186.03, 1,636.82 and 688.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,186.03 : 1,636.82 = 688.83 : x
2. Step 2: Convert to fraction form
   1,186.03/1,636.82 = 688.83/x
3. Step 3: Cross multiply
   1,186.03x = 1,636.82 × 688.83
4. Step 4: Simplify right side
   1,186.03x = 1,127,490.72
5. Step 5: Solve for x
   x = 1,127,490.72/1,186.03
6. Step 6: Final answer
   x = 950.64