Finding the Third Proportional to 7,814.81 and 12,118.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,814.81 : 12,118.78 = 12,118.78 : x
2. Step 2: Convert to fraction form
   7,814.81/12,118.78 = 12,118.78/x
3. Step 3: Cross multiply
   7,814.81x = 12,118.78 × 12,118.78
4. Step 4: Simplify right side
   7,814.81x = 146,864,858.99
5. Step 5: Solve for x
   x = 146,864,858.99/7,814.81
6. Step 6: Final answer
   x = 18,793.14