Finding the Third Proportional to 19,659.38 and 42,429.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,659.38 : 42,429.38 = 42,429.38 : x
2. Step 2: Convert to fraction form
   19,659.38/42,429.38 = 42,429.38/x
3. Step 3: Cross multiply
   19,659.38x = 42,429.38 × 42,429.38
4. Step 4: Simplify right side
   19,659.38x = 1,800,251,862.89
5. Step 5: Solve for x
   x = 1,800,251,862.89/19,659.38
6. Step 6: Final answer
   x = 91,572.18