Finding the Fourth Proportional to 805.29, 1,111.31 and 451.25

Step by Step Solution

1. Step 1: Write the proportion equation
   805.29 : 1,111.31 = 451.25 : x
2. Step 2: Convert to fraction form
   805.29/1,111.31 = 451.25/x
3. Step 3: Cross multiply
   805.29x = 1,111.31 × 451.25
4. Step 4: Simplify right side
   805.29x = 501,470.82
5. Step 5: Solve for x
   x = 501,470.82/805.29
6. Step 6: Final answer
   x = 622.72