Finding the Third Proportional to 395,437 and 612,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   395,437 : 612,818.50 = 612,818.50 : x
2. Step 2: Convert to fraction form
   395,437/612,818.50 = 612,818.50/x
3. Step 3: Cross multiply
   395,437x = 612,818.50 × 612,818.50
4. Step 4: Simplify right side
   395,437x = 375,546,513,942.25
5. Step 5: Solve for x
   x = 375,546,513,942.25/395,437
6. Step 6: Final answer
   x = 949,699.99