Finding the Fourth Proportional to 7,274.72, 10,915.68 and 5,429.54

Step by Step Solution

1. Step 1: Write the proportion equation
   7,274.72 : 10,915.68 = 5,429.54 : x
2. Step 2: Convert to fraction form
   7,274.72/10,915.68 = 5,429.54/x
3. Step 3: Cross multiply
   7,274.72x = 10,915.68 × 5,429.54
4. Step 4: Simplify right side
   7,274.72x = 59,267,121.19
5. Step 5: Solve for x
   x = 59,267,121.19/7,274.72
6. Step 6: Final answer
   x = 8,147.00