Finding the Third Proportional to 31,158 and 67,340

Step by Step Solution

1. Step 1: Write the proportion equation
   31,158 : 67,340 = 67,340 : x
2. Step 2: Convert to fraction form
   31,158/67,340 = 67,340/x
3. Step 3: Cross multiply
   31,158x = 67,340 × 67,340
4. Step 4: Simplify right side
   31,158x = 4,534,675,600
5. Step 5: Solve for x
   x = 4,534,675,600/31,158
6. Step 6: Final answer
   x = 145,538.08