Finding the Fourth Proportional to 1,674.59, 2,510.95 and 688.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,674.59 : 2,510.95 = 688.10 : x
2. Step 2: Convert to fraction form
   1,674.59/2,510.95 = 688.10/x
3. Step 3: Cross multiply
   1,674.59x = 2,510.95 × 688.10
4. Step 4: Simplify right side
   1,674.59x = 1,727,771.71
5. Step 5: Solve for x
   x = 1,727,771.71/1,674.59
6. Step 6: Final answer
   x = 1,031.76