Finding the Third Proportional to 31,474 and 63,860

Step by Step Solution

1. Step 1: Write the proportion equation
   31,474 : 63,860 = 63,860 : x
2. Step 2: Convert to fraction form
   31,474/63,860 = 63,860/x
3. Step 3: Cross multiply
   31,474x = 63,860 × 63,860
4. Step 4: Simplify right side
   31,474x = 4,078,099,600
5. Step 5: Solve for x
   x = 4,078,099,600/31,474
6. Step 6: Final answer
   x = 129,570.43