Finding the Third Proportional to 78,210 and 167,488

Step by Step Solution

1. Step 1: Write the proportion equation
   78,210 : 167,488 = 167,488 : x
2. Step 2: Convert to fraction form
   78,210/167,488 = 167,488/x
3. Step 3: Cross multiply
   78,210x = 167,488 × 167,488
4. Step 4: Simplify right side
   78,210x = 28,052,230,144
5. Step 5: Solve for x
   x = 28,052,230,144/78,210
6. Step 6: Final answer
   x = 358,678.30