Finding the Third Proportional to 78,448 and 170,000

Step by Step Solution

1. Step 1: Write the proportion equation
   78,448 : 170,000 = 170,000 : x
2. Step 2: Convert to fraction form
   78,448/170,000 = 170,000/x
3. Step 3: Cross multiply
   78,448x = 170,000 × 170,000
4. Step 4: Simplify right side
   78,448x = 28,900,000,000
5. Step 5: Solve for x
   x = 28,900,000,000/78,448
6. Step 6: Final answer
   x = 368,396.90