Finding the Third Proportional to 300,898.50 and 660,835.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,898.50 : 660,835.50 = 660,835.50 : x
2. Step 2: Convert to fraction form
   300,898.50/660,835.50 = 660,835.50/x
3. Step 3: Cross multiply
   300,898.50x = 660,835.50 × 660,835.50
4. Step 4: Simplify right side
   300,898.50x = 436,703,558,060.25
5. Step 5: Solve for x
   x = 436,703,558,060.25/300,898.50
6. Step 6: Final answer
   x = 1,451,331.79