Finding the Fourth Proportional to 1,173.34, 1,761.18 and 687.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.34 : 1,761.18 = 687.34 : x
2. Step 2: Convert to fraction form
   1,173.34/1,761.18 = 687.34/x
3. Step 3: Cross multiply
   1,173.34x = 1,761.18 × 687.34
4. Step 4: Simplify right side
   1,173.34x = 1,210,529.46
5. Step 5: Solve for x
   x = 1,210,529.46/1,173.34
6. Step 6: Final answer
   x = 1,031.70