Finding the Fourth Proportional to 5,150.61, 7,725.21 and 2,228.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,150.61 : 7,725.21 = 2,228.55 : x
2. Step 2: Convert to fraction form
   5,150.61/7,725.21 = 2,228.55/x
3. Step 3: Cross multiply
   5,150.61x = 7,725.21 × 2,228.55
4. Step 4: Simplify right side
   5,150.61x = 17,216,016.75
5. Step 5: Solve for x
   x = 17,216,016.75/5,150.61
6. Step 6: Final answer
   x = 3,342.52