Finding the Third Proportional to 16,893.56 and 21,915.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,893.56 : 21,915.56 = 21,915.56 : x
2. Step 2: Convert to fraction form
   16,893.56/21,915.56 = 21,915.56/x
3. Step 3: Cross multiply
   16,893.56x = 21,915.56 × 21,915.56
4. Step 4: Simplify right side
   16,893.56x = 480,291,879.69
5. Step 5: Solve for x
   x = 480,291,879.69/16,893.56
6. Step 6: Final answer
   x = 28,430.47