Finding the Fourth Proportional to 5,309.30, 7,423.30 and 5,309.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,309.30 : 7,423.30 = 5,309.30 : x
2. Step 2: Convert to fraction form
   5,309.30/7,423.30 = 5,309.30/x
3. Step 3: Cross multiply
   5,309.30x = 7,423.30 × 5,309.30
4. Step 4: Simplify right side
   5,309.30x = 39,412,526.69
5. Step 5: Solve for x
   x = 39,412,526.69/5,309.30
6. Step 6: Final answer
   x = 7,423.30