Finding the Fourth Proportional to 8,897.72, 12,277.10 and 5,361.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,897.72 : 12,277.10 = 5,361.12 : x
2. Step 2: Convert to fraction form
   8,897.72/12,277.10 = 5,361.12/x
3. Step 3: Cross multiply
   8,897.72x = 12,277.10 × 5,361.12
4. Step 4: Simplify right side
   8,897.72x = 65,819,019.75
5. Step 5: Solve for x
   x = 65,819,019.75/8,897.72
6. Step 6: Final answer
   x = 7,397.29