Finding the Third Proportional to 31,406.91 and 68,350.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,406.91 : 68,350.78 = 68,350.78 : x
2. Step 2: Convert to fraction form
   31,406.91/68,350.78 = 68,350.78/x
3. Step 3: Cross multiply
   31,406.91x = 68,350.78 × 68,350.78
4. Step 4: Simplify right side
   31,406.91x = 4,671,829,297.49
5. Step 5: Solve for x
   x = 4,671,829,297.49/31,406.91
6. Step 6: Final answer
   x = 148,751.66