Finding the Fourth Proportional to 1,150.17, 1,721.00 and 688.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.17 : 1,721.00 = 688.28 : x
2. Step 2: Convert to fraction form
   1,150.17/1,721.00 = 688.28/x
3. Step 3: Cross multiply
   1,150.17x = 1,721.00 × 688.28
4. Step 4: Simplify right side
   1,150.17x = 1,184,517.83
5. Step 5: Solve for x
   x = 1,184,517.83/1,150.17
6. Step 6: Final answer
   x = 1,029.86