Finding the Fourth Proportional to 3,002.06, 4,502.89 and 810.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,002.06 : 4,502.89 = 810.81 : x
2. Step 2: Convert to fraction form
   3,002.06/4,502.89 = 810.81/x
3. Step 3: Cross multiply
   3,002.06x = 4,502.89 × 810.81
4. Step 4: Simplify right side
   3,002.06x = 3,650,989.25
5. Step 5: Solve for x
   x = 3,650,989.25/3,002.06
6. Step 6: Final answer
   x = 1,216.16