Finding the Third Proportional to 85,405.50 and 187,443

Step by Step Solution

1. Step 1: Write the proportion equation
   85,405.50 : 187,443 = 187,443 : x
2. Step 2: Convert to fraction form
   85,405.50/187,443 = 187,443/x
3. Step 3: Cross multiply
   85,405.50x = 187,443 × 187,443
4. Step 4: Simplify right side
   85,405.50x = 35,134,878,249
5. Step 5: Solve for x
   x = 35,134,878,249/85,405.50
6. Step 6: Final answer
   x = 411,388.94