Finding the Third Proportional to 78,513.50 and 171,695

Step by Step Solution

1. Step 1: Write the proportion equation
   78,513.50 : 171,695 = 171,695 : x
2. Step 2: Convert to fraction form
   78,513.50/171,695 = 171,695/x
3. Step 3: Cross multiply
   78,513.50x = 171,695 × 171,695
4. Step 4: Simplify right side
   78,513.50x = 29,479,173,025
5. Step 5: Solve for x
   x = 29,479,173,025/78,513.50
6. Step 6: Final answer
   x = 375,466.30