Finding the Fourth Proportional to 5,522.42, 7,617.57 and 3,947.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,522.42 : 7,617.57 = 3,947.78 : x
2. Step 2: Convert to fraction form
   5,522.42/7,617.57 = 3,947.78/x
3. Step 3: Cross multiply
   5,522.42x = 7,617.57 × 3,947.78
4. Step 4: Simplify right side
   5,522.42x = 30,072,490.49
5. Step 5: Solve for x
   x = 30,072,490.49/5,522.42
6. Step 6: Final answer
   x = 5,445.53