Finding the Third Proportional to 3,338.72 and 7,123.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,338.72 : 7,123.99 = 7,123.99 : x
2. Step 2: Convert to fraction form
   3,338.72/7,123.99 = 7,123.99/x
3. Step 3: Cross multiply
   3,338.72x = 7,123.99 × 7,123.99
4. Step 4: Simplify right side
   3,338.72x = 50,751,264.69
5. Step 5: Solve for x
   x = 50,751,264.69/3,338.72
6. Step 6: Final answer
   x = 15,200.82