Finding the Third Proportional to 31,239.84 and 68,561.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,239.84 : 68,561.86 = 68,561.86 : x
2. Step 2: Convert to fraction form
   31,239.84/68,561.86 = 68,561.86/x
3. Step 3: Cross multiply
   31,239.84x = 68,561.86 × 68,561.86
4. Step 4: Simplify right side
   31,239.84x = 4,700,728,560.96
5. Step 5: Solve for x
   x = 4,700,728,560.96/31,239.84
6. Step 6: Final answer
   x = 150,472.22