Finding the Fourth Proportional to 3,375.72, 5,063.94 and 910.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,375.72 : 5,063.94 = 910.55 : x
2. Step 2: Convert to fraction form
   3,375.72/5,063.94 = 910.55/x
3. Step 3: Cross multiply
   3,375.72x = 5,063.94 × 910.55
4. Step 4: Simplify right side
   3,375.72x = 4,610,945.25
5. Step 5: Solve for x
   x = 4,610,945.25/3,375.72
6. Step 6: Final answer
   x = 1,365.91