Finding the Third Proportional to 269,878.50 and 396,069

Step by Step Solution

1. Step 1: Write the proportion equation
   269,878.50 : 396,069 = 396,069 : x
2. Step 2: Convert to fraction form
   269,878.50/396,069 = 396,069/x
3. Step 3: Cross multiply
   269,878.50x = 396,069 × 396,069
4. Step 4: Simplify right side
   269,878.50x = 156,870,652,761
5. Step 5: Solve for x
   x = 156,870,652,761/269,878.50
6. Step 6: Final answer
   x = 581,263.99