Finding the Third Proportional to 20,279.25 and 42,108.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,279.25 : 42,108.75 = 42,108.75 : x
2. Step 2: Convert to fraction form
   20,279.25/42,108.75 = 42,108.75/x
3. Step 3: Cross multiply
   20,279.25x = 42,108.75 × 42,108.75
4. Step 4: Simplify right side
   20,279.25x = 1,773,146,826.56
5. Step 5: Solve for x
   x = 1,773,146,826.56/20,279.25
6. Step 6: Final answer
   x = 87,436.51