Finding the Fourth Proportional to 1,351.30, 2,022.15 and 1,236.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.30 : 2,022.15 = 1,236.10 : x
2. Step 2: Convert to fraction form
   1,351.30/2,022.15 = 1,236.10/x
3. Step 3: Cross multiply
   1,351.30x = 2,022.15 × 1,236.10
4. Step 4: Simplify right side
   1,351.30x = 2,499,579.62
5. Step 5: Solve for x
   x = 2,499,579.62/1,351.30
6. Step 6: Final answer
   x = 1,849.76