Finding the Fourth Proportional to 2,552.22, 3,828.78 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,552.22 : 3,828.78 = 909.72 : x
2. Step 2: Convert to fraction form
   2,552.22/3,828.78 = 909.72/x
3. Step 3: Cross multiply
   2,552.22x = 3,828.78 × 909.72
4. Step 4: Simplify right side
   2,552.22x = 3,483,117.74
5. Step 5: Solve for x
   x = 3,483,117.74/2,552.22
6. Step 6: Final answer
   x = 1,364.74