Finding the Third Proportional to 435,329 and 638,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   435,329 : 638,089.50 = 638,089.50 : x
2. Step 2: Convert to fraction form
   435,329/638,089.50 = 638,089.50/x
3. Step 3: Cross multiply
   435,329x = 638,089.50 × 638,089.50
4. Step 4: Simplify right side
   435,329x = 407,158,210,010.25
5. Step 5: Solve for x
   x = 407,158,210,010.25/435,329
6. Step 6: Final answer
   x = 935,288.51