Finding the Fourth Proportional to 2,009.09, 3,012.69 and 777.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.09 : 3,012.69 = 777.08 : x
2. Step 2: Convert to fraction form
   2,009.09/3,012.69 = 777.08/x
3. Step 3: Cross multiply
   2,009.09x = 3,012.69 × 777.08
4. Step 4: Simplify right side
   2,009.09x = 2,341,101.15
5. Step 5: Solve for x
   x = 2,341,101.15/2,009.09
6. Step 6: Final answer
   x = 1,165.25