Finding the Fourth Proportional to 2,066.77, 3,099.89 and 912.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.77 : 3,099.89 = 912.25 : x
2. Step 2: Convert to fraction form
   2,066.77/3,099.89 = 912.25/x
3. Step 3: Cross multiply
   2,066.77x = 3,099.89 × 912.25
4. Step 4: Simplify right side
   2,066.77x = 2,827,870.09
5. Step 5: Solve for x
   x = 2,827,870.09/2,066.77
6. Step 6: Final answer
   x = 1,368.26