Finding the Third Proportional to 20,131.50 and 42,099

Step by Step Solution

1. Step 1: Write the proportion equation
   20,131.50 : 42,099 = 42,099 : x
2. Step 2: Convert to fraction form
   20,131.50/42,099 = 42,099/x
3. Step 3: Cross multiply
   20,131.50x = 42,099 × 42,099
4. Step 4: Simplify right side
   20,131.50x = 1,772,325,801
5. Step 5: Solve for x
   x = 1,772,325,801/20,131.50
6. Step 6: Final answer
   x = 88,037.44