Finding the Third Proportional to 172,478 and 371,200

Step by Step Solution

1. Step 1: Write the proportion equation
   172,478 : 371,200 = 371,200 : x
2. Step 2: Convert to fraction form
   172,478/371,200 = 371,200/x
3. Step 3: Cross multiply
   172,478x = 371,200 × 371,200
4. Step 4: Simplify right side
   172,478x = 137,789,440,000
5. Step 5: Solve for x
   x = 137,789,440,000/172,478
6. Step 6: Final answer
   x = 798,881.25