Finding the Third Proportional to 190,143 and 403,609.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,143 : 403,609.50 = 403,609.50 : x
2. Step 2: Convert to fraction form
   190,143/403,609.50 = 403,609.50/x
3. Step 3: Cross multiply
   190,143x = 403,609.50 × 403,609.50
4. Step 4: Simplify right side
   190,143x = 162,900,628,490.25
5. Step 5: Solve for x
   x = 162,900,628,490.25/190,143
6. Step 6: Final answer
   x = 856,726.93