Finding the Fourth Proportional to 1,648.72, 2,273.40 and 1,229.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.72 : 2,273.40 = 1,229.32 : x
2. Step 2: Convert to fraction form
   1,648.72/2,273.40 = 1,229.32/x
3. Step 3: Cross multiply
   1,648.72x = 2,273.40 × 1,229.32
4. Step 4: Simplify right side
   1,648.72x = 2,794,736.09
5. Step 5: Solve for x
   x = 2,794,736.09/1,648.72
6. Step 6: Final answer
   x = 1,695.09