Finding the Third Proportional to 172,080 and 402,160

Step by Step Solution

1. Step 1: Write the proportion equation
   172,080 : 402,160 = 402,160 : x
2. Step 2: Convert to fraction form
   172,080/402,160 = 402,160/x
3. Step 3: Cross multiply
   172,080x = 402,160 × 402,160
4. Step 4: Simplify right side
   172,080x = 161,732,665,600
5. Step 5: Solve for x
   x = 161,732,665,600/172,080
6. Step 6: Final answer
   x = 939,869.05