Finding the Fourth Proportional to 7,123.10, 9,952.90 and 7,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.10 : 9,952.90 = 7,123.10 : x
2. Step 2: Convert to fraction form
   7,123.10/9,952.90 = 7,123.10/x
3. Step 3: Cross multiply
   7,123.10x = 9,952.90 × 7,123.10
4. Step 4: Simplify right side
   7,123.10x = 70,895,501.99
5. Step 5: Solve for x
   x = 70,895,501.99/7,123.10
6. Step 6: Final answer
   x = 9,952.90