Finding the Third Proportional to 122,143 and 269,139

Step by Step Solution

1. Step 1: Write the proportion equation
   122,143 : 269,139 = 269,139 : x
2. Step 2: Convert to fraction form
   122,143/269,139 = 269,139/x
3. Step 3: Cross multiply
   122,143x = 269,139 × 269,139
4. Step 4: Simplify right side
   122,143x = 72,435,801,321
5. Step 5: Solve for x
   x = 72,435,801,321/122,143
6. Step 6: Final answer
   x = 593,040.95