Finding the Third Proportional to 395,405.50 and 612,771

Step by Step Solution

1. Step 1: Write the proportion equation
   395,405.50 : 612,771 = 612,771 : x
2. Step 2: Convert to fraction form
   395,405.50/612,771 = 612,771/x
3. Step 3: Cross multiply
   395,405.50x = 612,771 × 612,771
4. Step 4: Simplify right side
   395,405.50x = 375,488,298,441
5. Step 5: Solve for x
   x = 375,488,298,441/395,405.50
6. Step 6: Final answer
   x = 949,628.42