Finding the Third Proportional to 139,591.69 and 170,209.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,591.69 : 170,209.69 = 170,209.69 : x
2. Step 2: Convert to fraction form
   139,591.69/170,209.69 = 170,209.69/x
3. Step 3: Cross multiply
   139,591.69x = 170,209.69 × 170,209.69
4. Step 4: Simplify right side
   139,591.69x = 28,971,337,718.85
5. Step 5: Solve for x
   x = 28,971,337,718.85/139,591.69
6. Step 6: Final answer
   x = 207,543.43