Finding the Fourth Proportional to 1,131.04, 1,560.36 and 688.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.04 : 1,560.36 = 688.84 : x
2. Step 2: Convert to fraction form
   1,131.04/1,560.36 = 688.84/x
3. Step 3: Cross multiply
   1,131.04x = 1,560.36 × 688.84
4. Step 4: Simplify right side
   1,131.04x = 1,074,838.38
5. Step 5: Solve for x
   x = 1,074,838.38/1,131.04
6. Step 6: Final answer
   x = 950.31