Finding the Third Proportional to 31,605.19 and 68,743.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,605.19 : 68,743.69 = 68,743.69 : x
2. Step 2: Convert to fraction form
   31,605.19/68,743.69 = 68,743.69/x
3. Step 3: Cross multiply
   31,605.19x = 68,743.69 × 68,743.69
4. Step 4: Simplify right side
   31,605.19x = 4,725,694,571.10
5. Step 5: Solve for x
   x = 4,725,694,571.10/31,605.19
6. Step 6: Final answer
   x = 149,522.75