Finding the Third Proportional to 171,209.25 and 266,139

Step by Step Solution

1. Step 1: Write the proportion equation
   171,209.25 : 266,139 = 266,139 : x
2. Step 2: Convert to fraction form
   171,209.25/266,139 = 266,139/x
3. Step 3: Cross multiply
   171,209.25x = 266,139 × 266,139
4. Step 4: Simplify right side
   171,209.25x = 70,829,967,321
5. Step 5: Solve for x
   x = 70,829,967,321/171,209.25
6. Step 6: Final answer
   x = 413,704.09