Finding the Third Proportional to 21,309 and 33,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,309 : 33,085.50 = 33,085.50 : x
2. Step 2: Convert to fraction form
   21,309/33,085.50 = 33,085.50/x
3. Step 3: Cross multiply
   21,309x = 33,085.50 × 33,085.50
4. Step 4: Simplify right side
   21,309x = 1,094,650,310.25
5. Step 5: Solve for x
   x = 1,094,650,310.25/21,309
6. Step 6: Final answer
   x = 51,370.33