Finding the Third Proportional to 31,590 and 67,068

Step by Step Solution

1. Step 1: Write the proportion equation
   31,590 : 67,068 = 67,068 : x
2. Step 2: Convert to fraction form
   31,590/67,068 = 67,068/x
3. Step 3: Cross multiply
   31,590x = 67,068 × 67,068
4. Step 4: Simplify right side
   31,590x = 4,498,116,624
5. Step 5: Solve for x
   x = 4,498,116,624/31,590
6. Step 6: Final answer
   x = 142,390.52