Finding the Third Proportional to 7,631 and 12,158

Step by Step Solution

1. Step 1: Write the proportion equation
   7,631 : 12,158 = 12,158 : x
2. Step 2: Convert to fraction form
   7,631/12,158 = 12,158/x
3. Step 3: Cross multiply
   7,631x = 12,158 × 12,158
4. Step 4: Simplify right side
   7,631x = 147,816,964
5. Step 5: Solve for x
   x = 147,816,964/7,631
6. Step 6: Final answer
   x = 19,370.59