Finding the Third Proportional to 100,559 and 209,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100,559 : 209,385.50 = 209,385.50 : x
2. Step 2: Convert to fraction form
   100,559/209,385.50 = 209,385.50/x
3. Step 3: Cross multiply
   100,559x = 209,385.50 × 209,385.50
4. Step 4: Simplify right side
   100,559x = 43,842,287,610.25
5. Step 5: Solve for x
   x = 43,842,287,610.25/100,559
6. Step 6: Final answer
   x = 435,985.72