Finding the Fourth Proportional to 8,778.72, 13,156.16 and 4,820.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,778.72 : 13,156.16 = 4,820.48 : x
2. Step 2: Convert to fraction form
   8,778.72/13,156.16 = 4,820.48/x
3. Step 3: Cross multiply
   8,778.72x = 13,156.16 × 4,820.48
4. Step 4: Simplify right side
   8,778.72x = 63,419,006.16
5. Step 5: Solve for x
   x = 63,419,006.16/8,778.72
6. Step 6: Final answer
   x = 7,224.17