Finding the Fourth Proportional to 1,287.01, 1,776.06 and 697.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287.01 : 1,776.06 = 697.54 : x
2. Step 2: Convert to fraction form
   1,287.01/1,776.06 = 697.54/x
3. Step 3: Cross multiply
   1,287.01x = 1,776.06 × 697.54
4. Step 4: Simplify right side
   1,287.01x = 1,238,864.01
5. Step 5: Solve for x
   x = 1,238,864.01/1,287.01
6. Step 6: Final answer
   x = 962.59