Finding the Third Proportional to 78,071.50 and 173,612

Step by Step Solution

1. Step 1: Write the proportion equation
   78,071.50 : 173,612 = 173,612 : x
2. Step 2: Convert to fraction form
   78,071.50/173,612 = 173,612/x
3. Step 3: Cross multiply
   78,071.50x = 173,612 × 173,612
4. Step 4: Simplify right side
   78,071.50x = 30,141,126,544
5. Step 5: Solve for x
   x = 30,141,126,544/78,071.50
6. Step 6: Final answer
   x = 386,070.80