Finding the Fourth Proportional to 7,720.72, 10,650.60 and 5,364.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,720.72 : 10,650.60 = 5,364.88 : x
2. Step 2: Convert to fraction form
   7,720.72/10,650.60 = 5,364.88/x
3. Step 3: Cross multiply
   7,720.72x = 10,650.60 × 5,364.88
4. Step 4: Simplify right side
   7,720.72x = 57,139,190.93
5. Step 5: Solve for x
   x = 57,139,190.93/7,720.72
6. Step 6: Final answer
   x = 7,400.76