Finding the Third Proportional to 70,720 and 156,160

Step by Step Solution

1. Step 1: Write the proportion equation
   70,720 : 156,160 = 156,160 : x
2. Step 2: Convert to fraction form
   70,720/156,160 = 156,160/x
3. Step 3: Cross multiply
   70,720x = 156,160 × 156,160
4. Step 4: Simplify right side
   70,720x = 24,385,945,600
5. Step 5: Solve for x
   x = 24,385,945,600/70,720
6. Step 6: Final answer
   x = 344,823.89