Finding the Third Proportional to 19,701.56 and 42,171.05

Step by Step Solution

1. Step 1: Write the proportion equation
   19,701.56 : 42,171.05 = 42,171.05 : x
2. Step 2: Convert to fraction form
   19,701.56/42,171.05 = 42,171.05/x
3. Step 3: Cross multiply
   19,701.56x = 42,171.05 × 42,171.05
4. Step 4: Simplify right side
   19,701.56x = 1,778,397,194.53
5. Step 5: Solve for x
   x = 1,778,397,194.53/19,701.56
6. Step 6: Final answer
   x = 90,266.81