Finding the Third Proportional to 19,792.13 and 40,390.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,792.13 : 40,390.31 = 40,390.31 : x
2. Step 2: Convert to fraction form
   19,792.13/40,390.31 = 40,390.31/x
3. Step 3: Cross multiply
   19,792.13x = 40,390.31 × 40,390.31
4. Step 4: Simplify right side
   19,792.13x = 1,631,377,343.85
5. Step 5: Solve for x
   x = 1,631,377,343.85/19,792.13
6. Step 6: Final answer
   x = 82,425.58