Finding the Third Proportional to 19,699.13 and 28,900.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,699.13 : 28,900.69 = 28,900.69 : x
2. Step 2: Convert to fraction form
   19,699.13/28,900.69 = 28,900.69/x
3. Step 3: Cross multiply
   19,699.13x = 28,900.69 × 28,900.69
4. Step 4: Simplify right side
   19,699.13x = 835,249,737.97
5. Step 5: Solve for x
   x = 835,249,737.97/19,699.13
6. Step 6: Final answer
   x = 42,400.35