Finding the Third Proportional to 10,215.47 and 15,620.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.47 : 15,620.34 = 15,620.34 : x
2. Step 2: Convert to fraction form
   10,215.47/15,620.34 = 15,620.34/x
3. Step 3: Cross multiply
   10,215.47x = 15,620.34 × 15,620.34
4. Step 4: Simplify right side
   10,215.47x = 243,995,138.87
5. Step 5: Solve for x
   x = 243,995,138.87/10,215.47
6. Step 6: Final answer
   x = 23,884.87