Finding the Third Proportional to 21,278.50 and 33,677.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,278.50 : 33,677.75 = 33,677.75 : x
2. Step 2: Convert to fraction form
   21,278.50/33,677.75 = 33,677.75/x
3. Step 3: Cross multiply
   21,278.50x = 33,677.75 × 33,677.75
4. Step 4: Simplify right side
   21,278.50x = 1,134,190,845.06
5. Step 5: Solve for x
   x = 1,134,190,845.06/21,278.50
6. Step 6: Final answer
   x = 53,302.20