Finding the Third Proportional to 31,180.89 and 68,397.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,180.89 : 68,397.86 = 68,397.86 : x
2. Step 2: Convert to fraction form
   31,180.89/68,397.86 = 68,397.86/x
3. Step 3: Cross multiply
   31,180.89x = 68,397.86 × 68,397.86
4. Step 4: Simplify right side
   31,180.89x = 4,678,266,632.72
5. Step 5: Solve for x
   x = 4,678,266,632.72/31,180.89
6. Step 6: Final answer
   x = 150,036.36