Finding the Third Proportional to 436,018.50 and 636,772.50

Step by Step Solution

1. Step 1: Write the proportion equation
   436,018.50 : 636,772.50 = 636,772.50 : x
2. Step 2: Convert to fraction form
   436,018.50/636,772.50 = 636,772.50/x
3. Step 3: Cross multiply
   436,018.50x = 636,772.50 × 636,772.50
4. Step 4: Simplify right side
   436,018.50x = 405,479,216,756.25
5. Step 5: Solve for x
   x = 405,479,216,756.25/436,018.50
6. Step 6: Final answer
   x = 929,958.74