Finding the Third Proportional to 190,628 and 412,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,628 : 412,636.50 = 412,636.50 : x
2. Step 2: Convert to fraction form
   190,628/412,636.50 = 412,636.50/x
3. Step 3: Cross multiply
   190,628x = 412,636.50 × 412,636.50
4. Step 4: Simplify right side
   190,628x = 170,268,881,132.25
5. Step 5: Solve for x
   x = 170,268,881,132.25/190,628
6. Step 6: Final answer
   x = 893,199.75