Finding the Third Proportional to 330,615 and 491,062.50

Step by Step Solution

1. Step 1: Write the proportion equation
   330,615 : 491,062.50 = 491,062.50 : x
2. Step 2: Convert to fraction form
   330,615/491,062.50 = 491,062.50/x
3. Step 3: Cross multiply
   330,615x = 491,062.50 × 491,062.50
4. Step 4: Simplify right side
   330,615x = 241,142,378,906.25
5. Step 5: Solve for x
   x = 241,142,378,906.25/330,615
6. Step 6: Final answer
   x = 729,375.19