Finding the Third Proportional to 19,697.77 and 42,163.45

Step by Step Solution

1. Step 1: Write the proportion equation
   19,697.77 : 42,163.45 = 42,163.45 : x
2. Step 2: Convert to fraction form
   19,697.77/42,163.45 = 42,163.45/x
3. Step 3: Cross multiply
   19,697.77x = 42,163.45 × 42,163.45
4. Step 4: Simplify right side
   19,697.77x = 1,777,756,779.42
5. Step 5: Solve for x
   x = 1,777,756,779.42/19,697.77
6. Step 6: Final answer
   x = 90,251.70