Finding the Third Proportional to 19,900.69 and 29,215.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,900.69 : 29,215.69 = 29,215.69 : x
2. Step 2: Convert to fraction form
   19,900.69/29,215.69 = 29,215.69/x
3. Step 3: Cross multiply
   19,900.69x = 29,215.69 × 29,215.69
4. Step 4: Simplify right side
   19,900.69x = 853,556,396.10
5. Step 5: Solve for x
   x = 853,556,396.10/19,900.69
6. Step 6: Final answer
   x = 42,890.80