Finding the Third Proportional to 31,258 and 67,403

Step by Step Solution

1. Step 1: Write the proportion equation
   31,258 : 67,403 = 67,403 : x
2. Step 2: Convert to fraction form
   31,258/67,403 = 67,403/x
3. Step 3: Cross multiply
   31,258x = 67,403 × 67,403
4. Step 4: Simplify right side
   31,258x = 4,543,164,409
5. Step 5: Solve for x
   x = 4,543,164,409/31,258
6. Step 6: Final answer
   x = 145,344.05