Finding the Third Proportional to 10,215.38 and 15,619.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.38 : 15,619.88 = 15,619.88 : x
2. Step 2: Convert to fraction form
   10,215.38/15,619.88 = 15,619.88/x
3. Step 3: Cross multiply
   10,215.38x = 15,619.88 × 15,619.88
4. Step 4: Simplify right side
   10,215.38x = 243,980,495.02
5. Step 5: Solve for x
   x = 243,980,495.02/10,215.38
6. Step 6: Final answer
   x = 23,883.66