Finding the Fourth Proportional to 2,007.21, 3,010.20 and 774.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.21 : 3,010.20 = 774.52 : x
2. Step 2: Convert to fraction form
   2,007.21/3,010.20 = 774.52/x
3. Step 3: Cross multiply
   2,007.21x = 3,010.20 × 774.52
4. Step 4: Simplify right side
   2,007.21x = 2,331,460.10
5. Step 5: Solve for x
   x = 2,331,460.10/2,007.21
6. Step 6: Final answer
   x = 1,161.54