Finding the Fourth Proportional to 2,272.89, 3,410.00 and 812.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,272.89 : 3,410.00 = 812.16 : x
2. Step 2: Convert to fraction form
   2,272.89/3,410.00 = 812.16/x
3. Step 3: Cross multiply
   2,272.89x = 3,410.00 × 812.16
4. Step 4: Simplify right side
   2,272.89x = 2,769,464.58
5. Step 5: Solve for x
   x = 2,769,464.58/2,272.89
6. Step 6: Final answer
   x = 1,218.48