Finding the Third Proportional to 436,104 and 639,802.50

Step by Step Solution

1. Step 1: Write the proportion equation
   436,104 : 639,802.50 = 639,802.50 : x
2. Step 2: Convert to fraction form
   436,104/639,802.50 = 639,802.50/x
3. Step 3: Cross multiply
   436,104x = 639,802.50 × 639,802.50
4. Step 4: Simplify right side
   436,104x = 409,347,239,006.25
5. Step 5: Solve for x
   x = 409,347,239,006.25/436,104
6. Step 6: Final answer
   x = 938,645.92