Finding the Third Proportional to 3,508.31 and 7,631.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,508.31 : 7,631.72 = 7,631.72 : x
2. Step 2: Convert to fraction form
   3,508.31/7,631.72 = 7,631.72/x
3. Step 3: Cross multiply
   3,508.31x = 7,631.72 × 7,631.72
4. Step 4: Simplify right side
   3,508.31x = 58,243,131.08
5. Step 5: Solve for x
   x = 58,243,131.08/3,508.31
6. Step 6: Final answer
   x = 16,601.47