Finding the Third Proportional to 300,899 and 442,134.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,899 : 442,134.50 = 442,134.50 : x
2. Step 2: Convert to fraction form
   300,899/442,134.50 = 442,134.50/x
3. Step 3: Cross multiply
   300,899x = 442,134.50 × 442,134.50
4. Step 4: Simplify right side
   300,899x = 195,482,916,090.25
5. Step 5: Solve for x
   x = 195,482,916,090.25/300,899
6. Step 6: Final answer
   x = 649,662.90