Finding the Fourth Proportional to 1,672.89, 2,509.56 and 698.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.89 : 2,509.56 = 698.76 : x
2. Step 2: Convert to fraction form
   1,672.89/2,509.56 = 698.76/x
3. Step 3: Cross multiply
   1,672.89x = 2,509.56 × 698.76
4. Step 4: Simplify right side
   1,672.89x = 1,753,580.15
5. Step 5: Solve for x
   x = 1,753,580.15/1,672.89
6. Step 6: Final answer
   x = 1,048.23