Finding the Third Proportional to 31,154 and 70,109

Step by Step Solution

1. Step 1: Write the proportion equation
   31,154 : 70,109 = 70,109 : x
2. Step 2: Convert to fraction form
   31,154/70,109 = 70,109/x
3. Step 3: Cross multiply
   31,154x = 70,109 × 70,109
4. Step 4: Simplify right side
   31,154x = 4,915,271,881
5. Step 5: Solve for x
   x = 4,915,271,881/31,154
6. Step 6: Final answer
   x = 157,773.38