Finding the Third Proportional to 10,615.59 and 21,691.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,615.59 : 21,691.88 = 21,691.88 : x
2. Step 2: Convert to fraction form
   10,615.59/21,691.88 = 21,691.88/x
3. Step 3: Cross multiply
   10,615.59x = 21,691.88 × 21,691.88
4. Step 4: Simplify right side
   10,615.59x = 470,537,441.02
5. Step 5: Solve for x
   x = 470,537,441.02/10,615.59
6. Step 6: Final answer
   x = 44,325.12