Finding the Third Proportional to 16,405.66 and 35,989.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,405.66 : 35,989.31 = 35,989.31 : x
2. Step 2: Convert to fraction form
   16,405.66/35,989.31 = 35,989.31/x
3. Step 3: Cross multiply
   16,405.66x = 35,989.31 × 35,989.31
4. Step 4: Simplify right side
   16,405.66x = 1,295,230,614.22
5. Step 5: Solve for x
   x = 1,295,230,614.22/16,405.66
6. Step 6: Final answer
   x = 78,950.21