Finding the Fourth Proportional to 8,889.28, 12,268.32 and 5,164.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,889.28 : 12,268.32 = 5,164.48 : x
2. Step 2: Convert to fraction form
   8,889.28/12,268.32 = 5,164.48/x
3. Step 3: Cross multiply
   8,889.28x = 12,268.32 × 5,164.48
4. Step 4: Simplify right side
   8,889.28x = 63,359,493.27
5. Step 5: Solve for x
   x = 63,359,493.27/8,889.28
6. Step 6: Final answer
   x = 7,127.63