Finding the Fourth Proportional to 8,979.76, 13,456.56 and 5,064.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,979.76 : 13,456.56 = 5,064.16 : x
2. Step 2: Convert to fraction form
   8,979.76/13,456.56 = 5,064.16/x
3. Step 3: Cross multiply
   8,979.76x = 13,456.56 × 5,064.16
4. Step 4: Simplify right side
   8,979.76x = 68,146,172.89
5. Step 5: Solve for x
   x = 68,146,172.89/8,979.76
6. Step 6: Final answer
   x = 7,588.86