Finding the Fourth Proportional to 7,766.72, 10,721.16 and 5,410.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,766.72 : 10,721.16 = 5,410.16 : x
2. Step 2: Convert to fraction form
   7,766.72/10,721.16 = 5,410.16/x
3. Step 3: Cross multiply
   7,766.72x = 10,721.16 × 5,410.16
4. Step 4: Simplify right side
   7,766.72x = 58,003,190.99
5. Step 5: Solve for x
   x = 58,003,190.99/7,766.72
6. Step 6: Final answer
   x = 7,468.17