Finding the Third Proportional to 399,856.50 and 880,768.69

Step by Step Solution

1. Step 1: Write the proportion equation
   399,856.50 : 880,768.69 = 880,768.69 : x
2. Step 2: Convert to fraction form
   399,856.50/880,768.69 = 880,768.69/x
3. Step 3: Cross multiply
   399,856.50x = 880,768.69 × 880,768.69
4. Step 4: Simplify right side
   399,856.50x = 775,753,480,880.47
5. Step 5: Solve for x
   x = 775,753,480,880.47/399,856.50
6. Step 6: Final answer
   x = 1,940,079.71