Finding the Third Proportional to 300,640.50 and 462,300.75

Step by Step Solution

1. Step 1: Write the proportion equation
   300,640.50 : 462,300.75 = 462,300.75 : x
2. Step 2: Convert to fraction form
   300,640.50/462,300.75 = 462,300.75/x
3. Step 3: Cross multiply
   300,640.50x = 462,300.75 × 462,300.75
4. Step 4: Simplify right side
   300,640.50x = 213,721,983,450.56
5. Step 5: Solve for x
   x = 213,721,983,450.56/300,640.50
6. Step 6: Final answer
   x = 710,888.86