Finding the Fourth Proportional to 6,638.31, 9,154.89 and 5,522.94

Step by Step Solution

1. Step 1: Write the proportion equation
   6,638.31 : 9,154.89 = 5,522.94 : x
2. Step 2: Convert to fraction form
   6,638.31/9,154.89 = 5,522.94/x
3. Step 3: Cross multiply
   6,638.31x = 9,154.89 × 5,522.94
4. Step 4: Simplify right side
   6,638.31x = 50,561,908.18
5. Step 5: Solve for x
   x = 50,561,908.18/6,638.31
6. Step 6: Final answer
   x = 7,616.68