Finding the Third Proportional to 90,621 and 187,614

Step by Step Solution

1. Step 1: Write the proportion equation
   90,621 : 187,614 = 187,614 : x
2. Step 2: Convert to fraction form
   90,621/187,614 = 187,614/x
3. Step 3: Cross multiply
   90,621x = 187,614 × 187,614
4. Step 4: Simplify right side
   90,621x = 35,199,012,996
5. Step 5: Solve for x
   x = 35,199,012,996/90,621
6. Step 6: Final answer
   x = 388,420.05