Finding the Fourth Proportional to 1,315.50, 1,809.60 and 1,262.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.50 : 1,809.60 = 1,262.22 : x
2. Step 2: Convert to fraction form
   1,315.50/1,809.60 = 1,262.22/x
3. Step 3: Cross multiply
   1,315.50x = 1,809.60 × 1,262.22
4. Step 4: Simplify right side
   1,315.50x = 2,284,113.31
5. Step 5: Solve for x
   x = 2,284,113.31/1,315.50
6. Step 6: Final answer
   x = 1,736.31