Finding the Third Proportional to 21,091.50 and 43,272

Step by Step Solution

1. Step 1: Write the proportion equation
   21,091.50 : 43,272 = 43,272 : x
2. Step 2: Convert to fraction form
   21,091.50/43,272 = 43,272/x
3. Step 3: Cross multiply
   21,091.50x = 43,272 × 43,272
4. Step 4: Simplify right side
   21,091.50x = 1,872,465,984
5. Step 5: Solve for x
   x = 1,872,465,984/21,091.50
6. Step 6: Final answer
   x = 88,778.23