Finding the Fourth Proportional to 2,225.43, 3,338.01 and 764.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.43 : 3,338.01 = 764.55 : x
2. Step 2: Convert to fraction form
   2,225.43/3,338.01 = 764.55/x
3. Step 3: Cross multiply
   2,225.43x = 3,338.01 × 764.55
4. Step 4: Simplify right side
   2,225.43x = 2,552,075.55
5. Step 5: Solve for x
   x = 2,552,075.55/2,225.43
6. Step 6: Final answer
   x = 1,146.78