Finding the Third Proportional to 85,372.69 and 123,338.81

Step by Step Solution

1. Step 1: Write the proportion equation
   85,372.69 : 123,338.81 = 123,338.81 : x
2. Step 2: Convert to fraction form
   85,372.69/123,338.81 = 123,338.81/x
3. Step 3: Cross multiply
   85,372.69x = 123,338.81 × 123,338.81
4. Step 4: Simplify right side
   85,372.69x = 15,212,462,668.91
5. Step 5: Solve for x
   x = 15,212,462,668.91/85,372.69
6. Step 6: Final answer
   x = 178,188.87