Finding the Fourth Proportional to 9,428.56, 13,011.98 and 5,450.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.56 : 13,011.98 = 5,450.64 : x
2. Step 2: Convert to fraction form
   9,428.56/13,011.98 = 5,450.64/x
3. Step 3: Cross multiply
   9,428.56x = 13,011.98 × 5,450.64
4. Step 4: Simplify right side
   9,428.56x = 70,923,618.67
5. Step 5: Solve for x
   x = 70,923,618.67/9,428.56
6. Step 6: Final answer
   x = 7,522.21