Finding the Fourth Proportional to 2,569.28, 3,853.89 and 621.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,569.28 : 3,853.89 = 621.47 : x
2. Step 2: Convert to fraction form
   2,569.28/3,853.89 = 621.47/x
3. Step 3: Cross multiply
   2,569.28x = 3,853.89 × 621.47
4. Step 4: Simplify right side
   2,569.28x = 2,395,086.65
5. Step 5: Solve for x
   x = 2,395,086.65/2,569.28
6. Step 6: Final answer
   x = 932.20