Finding the Third Proportional to 16,390 and 35,555

Step by Step Solution

1. Step 1: Write the proportion equation
   16,390 : 35,555 = 35,555 : x
2. Step 2: Convert to fraction form
   16,390/35,555 = 35,555/x
3. Step 3: Cross multiply
   16,390x = 35,555 × 35,555
4. Step 4: Simplify right side
   16,390x = 1,264,158,025
5. Step 5: Solve for x
   x = 1,264,158,025/16,390
6. Step 6: Final answer
   x = 77,129.84