Finding the Third Proportional to 4,680.56 and 9,691.88

Step by Step Solution

1. Step 1: Write the proportion equation
   4,680.56 : 9,691.88 = 9,691.88 : x
2. Step 2: Convert to fraction form
   4,680.56/9,691.88 = 9,691.88/x
3. Step 3: Cross multiply
   4,680.56x = 9,691.88 × 9,691.88
4. Step 4: Simplify right side
   4,680.56x = 93,932,441.02
5. Step 5: Solve for x
   x = 93,932,441.02/4,680.56
6. Step 6: Final answer
   x = 20,068.62