Finding the Third Proportional to 21,165.05 and 28,827.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,165.05 : 28,827.77 = 28,827.77 : x
2. Step 2: Convert to fraction form
   21,165.05/28,827.77 = 28,827.77/x
3. Step 3: Cross multiply
   21,165.05x = 28,827.77 × 28,827.77
4. Step 4: Simplify right side
   21,165.05x = 831,040,521.36
5. Step 5: Solve for x
   x = 831,040,521.36/21,165.05
6. Step 6: Final answer
   x = 39,264.76