Finding the Third Proportional to 3,621.38 and 7,631.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,621.38 : 7,631.86 = 7,631.86 : x
2. Step 2: Convert to fraction form
   3,621.38/7,631.86 = 7,631.86/x
3. Step 3: Cross multiply
   3,621.38x = 7,631.86 × 7,631.86
4. Step 4: Simplify right side
   3,621.38x = 58,245,277.52
5. Step 5: Solve for x
   x = 58,245,277.52/3,621.38
6. Step 6: Final answer
   x = 16,083.75