Finding the Fourth Proportional to 8,905.10, 12,288.96 and 5,321.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,905.10 : 12,288.96 = 5,321.69 : x
2. Step 2: Convert to fraction form
   8,905.10/12,288.96 = 5,321.69/x
3. Step 3: Cross multiply
   8,905.10x = 12,288.96 × 5,321.69
4. Step 4: Simplify right side
   8,905.10x = 65,397,974.10
5. Step 5: Solve for x
   x = 65,397,974.10/8,905.10
6. Step 6: Final answer
   x = 7,343.88