Finding the Fourth Proportional to 2,064.88, 2,849.28 and 1,225.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.88 : 2,849.28 = 1,225.60 : x
2. Step 2: Convert to fraction form
   2,064.88/2,849.28 = 1,225.60/x
3. Step 3: Cross multiply
   2,064.88x = 2,849.28 × 1,225.60
4. Step 4: Simplify right side
   2,064.88x = 3,492,077.57
5. Step 5: Solve for x
   x = 3,492,077.57/2,064.88
6. Step 6: Final answer
   x = 1,691.18