Finding the Third Proportional to 312,609 and 484,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,609 : 484,357.50 = 484,357.50 : x
2. Step 2: Convert to fraction form
   312,609/484,357.50 = 484,357.50/x
3. Step 3: Cross multiply
   312,609x = 484,357.50 × 484,357.50
4. Step 4: Simplify right side
   312,609x = 234,602,187,806.25
5. Step 5: Solve for x
   x = 234,602,187,806.25/312,609
6. Step 6: Final answer
   x = 750,465.24