Finding the Fourth Proportional to 1,263.41, 1,744.61 and 1,222.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,263.41 : 1,744.61 = 1,222.10 : x
2. Step 2: Convert to fraction form
   1,263.41/1,744.61 = 1,222.10/x
3. Step 3: Cross multiply
   1,263.41x = 1,744.61 × 1,222.10
4. Step 4: Simplify right side
   1,263.41x = 2,132,087.88
5. Step 5: Solve for x
   x = 2,132,087.88/1,263.41
6. Step 6: Final answer
   x = 1,687.57