Finding the Third Proportional to 19,877.91 and 42,489.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,877.91 : 42,489.56 = 42,489.56 : x
2. Step 2: Convert to fraction form
   19,877.91/42,489.56 = 42,489.56/x
3. Step 3: Cross multiply
   19,877.91x = 42,489.56 × 42,489.56
4. Step 4: Simplify right side
   19,877.91x = 1,805,362,921.44
5. Step 5: Solve for x
   x = 1,805,362,921.44/19,877.91
6. Step 6: Final answer
   x = 90,822.59