Finding the Third Proportional to 31,831.50 and 69,141

Step by Step Solution

1. Step 1: Write the proportion equation
   31,831.50 : 69,141 = 69,141 : x
2. Step 2: Convert to fraction form
   31,831.50/69,141 = 69,141/x
3. Step 3: Cross multiply
   31,831.50x = 69,141 × 69,141
4. Step 4: Simplify right side
   31,831.50x = 4,780,477,881
5. Step 5: Solve for x
   x = 4,780,477,881/31,831.50
6. Step 6: Final answer
   x = 150,180.73