Finding the Third Proportional to 31,607 and 67,711

Step by Step Solution

1. Step 1: Write the proportion equation
   31,607 : 67,711 = 67,711 : x
2. Step 2: Convert to fraction form
   31,607/67,711 = 67,711/x
3. Step 3: Cross multiply
   31,607x = 67,711 × 67,711
4. Step 4: Simplify right side
   31,607x = 4,584,779,521
5. Step 5: Solve for x
   x = 4,584,779,521/31,607
6. Step 6: Final answer
   x = 145,055.83