Finding the Third Proportional to 408,281 and 612,828.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,281 : 612,828.50 = 612,828.50 : x
2. Step 2: Convert to fraction form
   408,281/612,828.50 = 612,828.50/x
3. Step 3: Cross multiply
   408,281x = 612,828.50 × 612,828.50
4. Step 4: Simplify right side
   408,281x = 375,558,770,412.25
5. Step 5: Solve for x
   x = 375,558,770,412.25/408,281
6. Step 6: Final answer
   x = 919,853.66