Finding the Third Proportional to 78,070.50 and 173,610

Step by Step Solution

1. Step 1: Write the proportion equation
   78,070.50 : 173,610 = 173,610 : x
2. Step 2: Convert to fraction form
   78,070.50/173,610 = 173,610/x
3. Step 3: Cross multiply
   78,070.50x = 173,610 × 173,610
4. Step 4: Simplify right side
   78,070.50x = 30,140,432,100
5. Step 5: Solve for x
   x = 30,140,432,100/78,070.50
6. Step 6: Final answer
   x = 386,066.85