Finding the Third Proportional to 122,139 and 168,081.75

Step by Step Solution

1. Step 1: Write the proportion equation
   122,139 : 168,081.75 = 168,081.75 : x
2. Step 2: Convert to fraction form
   122,139/168,081.75 = 168,081.75/x
3. Step 3: Cross multiply
   122,139x = 168,081.75 × 168,081.75
4. Step 4: Simplify right side
   122,139x = 28,251,474,683.06
5. Step 5: Solve for x
   x = 28,251,474,683.06/122,139
6. Step 6: Final answer
   x = 231,305.93