Finding the Third Proportional to 7,989.38 and 17,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,989.38 : 17,420.72 = 17,420.72 : x
2. Step 2: Convert to fraction form
   7,989.38/17,420.72 = 17,420.72/x
3. Step 3: Cross multiply
   7,989.38x = 17,420.72 × 17,420.72
4. Step 4: Simplify right side
   7,989.38x = 303,481,441.77
5. Step 5: Solve for x
   x = 303,481,441.77/7,989.38
6. Step 6: Final answer
   x = 37,985.63