Finding the Fourth Proportional to 1,672.41, 2,510.06 and 685.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.41 : 2,510.06 = 685.76 : x
2. Step 2: Convert to fraction form
   1,672.41/2,510.06 = 685.76/x
3. Step 3: Cross multiply
   1,672.41x = 2,510.06 × 685.76
4. Step 4: Simplify right side
   1,672.41x = 1,721,282.77
5. Step 5: Solve for x
   x = 1,721,282.77/1,672.41
6. Step 6: Final answer
   x = 1,029.22