Finding the Third Proportional to 395,791.50 and 771,900

Step by Step Solution

1. Step 1: Write the proportion equation
   395,791.50 : 771,900 = 771,900 : x
2. Step 2: Convert to fraction form
   395,791.50/771,900 = 771,900/x
3. Step 3: Cross multiply
   395,791.50x = 771,900 × 771,900
4. Step 4: Simplify right side
   395,791.50x = 595,829,610,000
5. Step 5: Solve for x
   x = 595,829,610,000/395,791.50
6. Step 6: Final answer
   x = 1,505,412.85