Finding the Fourth Proportional to 5,504.05, 7,720.25 and 5,504.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,504.05 : 7,720.25 = 5,504.05 : x
2. Step 2: Convert to fraction form
   5,504.05/7,720.25 = 5,504.05/x
3. Step 3: Cross multiply
   5,504.05x = 7,720.25 × 5,504.05
4. Step 4: Simplify right side
   5,504.05x = 42,492,642.01
5. Step 5: Solve for x
   x = 42,492,642.01/5,504.05
6. Step 6: Final answer
   x = 7,720.25