Finding the Third Proportional to 404,581.50 and 607,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,581.50 : 607,909.50 = 607,909.50 : x
2. Step 2: Convert to fraction form
   404,581.50/607,909.50 = 607,909.50/x
3. Step 3: Cross multiply
   404,581.50x = 607,909.50 × 607,909.50
4. Step 4: Simplify right side
   404,581.50x = 369,553,960,190.25
5. Step 5: Solve for x
   x = 369,553,960,190.25/404,581.50
6. Step 6: Final answer
   x = 913,422.78