Finding the Third Proportional to 171,689.50 and 371,980

Step by Step Solution

1. Step 1: Write the proportion equation
   171,689.50 : 371,980 = 371,980 : x
2. Step 2: Convert to fraction form
   171,689.50/371,980 = 371,980/x
3. Step 3: Cross multiply
   171,689.50x = 371,980 × 371,980
4. Step 4: Simplify right side
   171,689.50x = 138,369,120,400
5. Step 5: Solve for x
   x = 138,369,120,400/171,689.50
6. Step 6: Final answer
   x = 805,926.52