Finding the Fourth Proportional to 860.22, 1,287.27 and 697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   860.22 : 1,287.27 = 697.50 : x
2. Step 2: Convert to fraction form
   860.22/1,287.27 = 697.50/x
3. Step 3: Cross multiply
   860.22x = 1,287.27 × 697.50
4. Step 4: Simplify right side
   860.22x = 897,870.83
5. Step 5: Solve for x
   x = 897,870.83/860.22
6. Step 6: Final answer
   x = 1,043.77