Finding the Third Proportional to 191,638 and 403,136.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,638 : 403,136.50 = 403,136.50 : x
2. Step 2: Convert to fraction form
   191,638/403,136.50 = 403,136.50/x
3. Step 3: Cross multiply
   191,638x = 403,136.50 × 403,136.50
4. Step 4: Simplify right side
   191,638x = 162,519,037,632.25
5. Step 5: Solve for x
   x = 162,519,037,632.25/191,638
6. Step 6: Final answer
   x = 848,052.25