Finding the Third Proportional to 78,300 and 166,860

Step by Step Solution

1. Step 1: Write the proportion equation
   78,300 : 166,860 = 166,860 : x
2. Step 2: Convert to fraction form
   78,300/166,860 = 166,860/x
3. Step 3: Cross multiply
   78,300x = 166,860 × 166,860
4. Step 4: Simplify right side
   78,300x = 27,842,259,600
5. Step 5: Solve for x
   x = 27,842,259,600/78,300
6. Step 6: Final answer
   x = 355,584.41