Finding the Third Proportional to 399,650 and 836,247.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,650 : 836,247.50 = 836,247.50 : x
2. Step 2: Convert to fraction form
   399,650/836,247.50 = 836,247.50/x
3. Step 3: Cross multiply
   399,650x = 836,247.50 × 836,247.50
4. Step 4: Simplify right side
   399,650x = 699,309,881,256.25
5. Step 5: Solve for x
   x = 699,309,881,256.25/399,650
6. Step 6: Final answer
   x = 1,749,805.78