Finding the Fourth Proportional to 10,778.04, 16,152.72 and 5,220.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,778.04 : 16,152.72 = 5,220.30 : x
2. Step 2: Convert to fraction form
   10,778.04/16,152.72 = 5,220.30/x
3. Step 3: Cross multiply
   10,778.04x = 16,152.72 × 5,220.30
4. Step 4: Simplify right side
   10,778.04x = 84,322,044.22
5. Step 5: Solve for x
   x = 84,322,044.22/10,778.04
6. Step 6: Final answer
   x = 7,823.50