Finding the Third Proportional to 12,380.81 and 26,128.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.81 : 26,128.31 = 26,128.31 : x
2. Step 2: Convert to fraction form
   12,380.81/26,128.31 = 26,128.31/x
3. Step 3: Cross multiply
   12,380.81x = 26,128.31 × 26,128.31
4. Step 4: Simplify right side
   12,380.81x = 682,688,714.10
5. Step 5: Solve for x
   x = 682,688,714.10/12,380.81
6. Step 6: Final answer
   x = 55,140.87