Finding the Third Proportional to 31,357 and 67,029.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,357 : 67,029.50 = 67,029.50 : x
2. Step 2: Convert to fraction form
   31,357/67,029.50 = 67,029.50/x
3. Step 3: Cross multiply
   31,357x = 67,029.50 × 67,029.50
4. Step 4: Simplify right side
   31,357x = 4,492,953,870.25
5. Step 5: Solve for x
   x = 4,492,953,870.25/31,357
6. Step 6: Final answer
   x = 143,283.92