Finding the Third Proportional to 3,688.53 and 7,992.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.53 : 7,992.31 = 7,992.31 : x
2. Step 2: Convert to fraction form
   3,688.53/7,992.31 = 7,992.31/x
3. Step 3: Cross multiply
   3,688.53x = 7,992.31 × 7,992.31
4. Step 4: Simplify right side
   3,688.53x = 63,877,059.10
5. Step 5: Solve for x
   x = 63,877,059.10/3,688.53
6. Step 6: Final answer
   x = 17,317.75