Finding the Third Proportional to 31,298 and 67,905

Step by Step Solution

1. Step 1: Write the proportion equation
   31,298 : 67,905 = 67,905 : x
2. Step 2: Convert to fraction form
   31,298/67,905 = 67,905/x
3. Step 3: Cross multiply
   31,298x = 67,905 × 67,905
4. Step 4: Simplify right side
   31,298x = 4,611,089,025
5. Step 5: Solve for x
   x = 4,611,089,025/31,298
6. Step 6: Final answer
   x = 147,328.55