Finding the Fourth Proportional to 1,866.50, 2,802.20 and 1,087.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.50 : 2,802.20 = 1,087.22 : x
2. Step 2: Convert to fraction form
   1,866.50/2,802.20 = 1,087.22/x
3. Step 3: Cross multiply
   1,866.50x = 2,802.20 × 1,087.22
4. Step 4: Simplify right side
   1,866.50x = 3,046,596.59
5. Step 5: Solve for x
   x = 3,046,596.59/1,866.50
6. Step 6: Final answer
   x = 1,632.26