Finding the Fourth Proportional to 2,225.95, 3,072.05 and 1,281.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.95 : 3,072.05 = 1,281.78 : x
2. Step 2: Convert to fraction form
   2,225.95/3,072.05 = 1,281.78/x
3. Step 3: Cross multiply
   2,225.95x = 3,072.05 × 1,281.78
4. Step 4: Simplify right side
   2,225.95x = 3,937,692.25
5. Step 5: Solve for x
   x = 3,937,692.25/2,225.95
6. Step 6: Final answer
   x = 1,768.99