Finding the Third Proportional to 201,136 and 418,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,136 : 418,810.50 = 418,810.50 : x
2. Step 2: Convert to fraction form
   201,136/418,810.50 = 418,810.50/x
3. Step 3: Cross multiply
   201,136x = 418,810.50 × 418,810.50
4. Step 4: Simplify right side
   201,136x = 175,402,234,910.25
5. Step 5: Solve for x
   x = 175,402,234,910.25/201,136
6. Step 6: Final answer
   x = 872,057.89