Finding the Third Proportional to 15,864.56 and 21,058.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,864.56 : 21,058.75 = 21,058.75 : x
2. Step 2: Convert to fraction form
   15,864.56/21,058.75 = 21,058.75/x
3. Step 3: Cross multiply
   15,864.56x = 21,058.75 × 21,058.75
4. Step 4: Simplify right side
   15,864.56x = 443,470,951.56
5. Step 5: Solve for x
   x = 443,470,951.56/15,864.56
6. Step 6: Final answer
   x = 27,953.56