Finding the Fourth Proportional to 9,172.87, 12,658.55 and 5,396.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,172.87 : 12,658.55 = 5,396.04 : x
2. Step 2: Convert to fraction form
   9,172.87/12,658.55 = 5,396.04/x
3. Step 3: Cross multiply
   9,172.87x = 12,658.55 × 5,396.04
4. Step 4: Simplify right side
   9,172.87x = 68,306,096.29
5. Step 5: Solve for x
   x = 68,306,096.29/9,172.87
6. Step 6: Final answer
   x = 7,446.53