Finding the Third Proportional to 16,005.75 and 21,415.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,005.75 : 21,415.88 = 21,415.88 : x
2. Step 2: Convert to fraction form
   16,005.75/21,415.88 = 21,415.88/x
3. Step 3: Cross multiply
   16,005.75x = 21,415.88 × 21,415.88
4. Step 4: Simplify right side
   16,005.75x = 458,639,702.02
5. Step 5: Solve for x
   x = 458,639,702.02/16,005.75
6. Step 6: Final answer
   x = 28,654.68