Finding the Third Proportional to 31,831.45 and 67,457.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,831.45 : 67,457.34 = 67,457.34 : x
2. Step 2: Convert to fraction form
   31,831.45/67,457.34 = 67,457.34/x
3. Step 3: Cross multiply
   31,831.45x = 67,457.34 × 67,457.34
4. Step 4: Simplify right side
   31,831.45x = 4,550,493,225.81
5. Step 5: Solve for x
   x = 4,550,493,225.81/31,831.45
6. Step 6: Final answer
   x = 142,955.87