Finding the Fourth Proportional to 2,645.30, 3,968.17 and 697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.30 : 3,968.17 = 697.50 : x
2. Step 2: Convert to fraction form
   2,645.30/3,968.17 = 697.50/x
3. Step 3: Cross multiply
   2,645.30x = 3,968.17 × 697.50
4. Step 4: Simplify right side
   2,645.30x = 2,767,796.83
5. Step 5: Solve for x
   x = 2,767,796.83/2,645.30
6. Step 6: Final answer
   x = 1,046.31