Finding the Third Proportional to 8,280.38 and 12,389.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.38 : 12,389.06 = 12,389.06 : x
2. Step 2: Convert to fraction form
   8,280.38/12,389.06 = 12,389.06/x
3. Step 3: Cross multiply
   8,280.38x = 12,389.06 × 12,389.06
4. Step 4: Simplify right side
   8,280.38x = 153,488,869.63
5. Step 5: Solve for x
   x = 153,488,869.63/8,280.38
6. Step 6: Final answer
   x = 18,536.46