Finding the Third Proportional to 200,978,608.50 and 435,345,660

Step by Step Solution

1. Step 1: Write the proportion equation
   200,978,608.50 : 435,345,660 = 435,345,660 : x
2. Step 2: Convert to fraction form
   200,978,608.50/435,345,660 = 435,345,660/x
3. Step 3: Cross multiply
   200,978,608.50x = 435,345,660 × 435,345,660
4. Step 4: Simplify right side
   200,978,608.50x = 189,525,843,680,835,584
5. Step 5: Solve for x
   x = 189,525,843,680,835,584/200,978,608.50
6. Step 6: Final answer
   x = 943,015,005.90