Finding the Third Proportional to 261,838.69 and 400,366.69

Step by Step Solution

1. Step 1: Write the proportion equation
   261,838.69 : 400,366.69 = 400,366.69 : x
2. Step 2: Convert to fraction form
   261,838.69/400,366.69 = 400,366.69/x
3. Step 3: Cross multiply
   261,838.69x = 400,366.69 × 400,366.69
4. Step 4: Simplify right side
   261,838.69x = 160,293,484,459.72
5. Step 5: Solve for x
   x = 160,293,484,459.72/261,838.69
6. Step 6: Final answer
   x = 612,184.11