Finding the Third Proportional to 21,513 and 28,908

Step by Step Solution

1. Step 1: Write the proportion equation
   21,513 : 28,908 = 28,908 : x
2. Step 2: Convert to fraction form
   21,513/28,908 = 28,908/x
3. Step 3: Cross multiply
   21,513x = 28,908 × 28,908
4. Step 4: Simplify right side
   21,513x = 835,672,464
5. Step 5: Solve for x
   x = 835,672,464/21,513
6. Step 6: Final answer
   x = 38,845.00