Finding the Third Proportional to 31,474 and 68,428

Step by Step Solution

1. Step 1: Write the proportion equation
   31,474 : 68,428 = 68,428 : x
2. Step 2: Convert to fraction form
   31,474/68,428 = 68,428/x
3. Step 3: Cross multiply
   31,474x = 68,428 × 68,428
4. Step 4: Simplify right side
   31,474x = 4,682,391,184
5. Step 5: Solve for x
   x = 4,682,391,184/31,474
6. Step 6: Final answer
   x = 148,770.13