Finding the Third Proportional to 170,639 and 371,376.50

Step by Step Solution

1. Step 1: Write the proportion equation
   170,639 : 371,376.50 = 371,376.50 : x
2. Step 2: Convert to fraction form
   170,639/371,376.50 = 371,376.50/x
3. Step 3: Cross multiply
   170,639x = 371,376.50 × 371,376.50
4. Step 4: Simplify right side
   170,639x = 137,920,504,752.25
5. Step 5: Solve for x
   x = 137,920,504,752.25/170,639
6. Step 6: Final answer
   x = 808,258.98