Finding the Third Proportional to 86,272 and 132,139

Step by Step Solution

1. Step 1: Write the proportion equation
   86,272 : 132,139 = 132,139 : x
2. Step 2: Convert to fraction form
   86,272/132,139 = 132,139/x
3. Step 3: Cross multiply
   86,272x = 132,139 × 132,139
4. Step 4: Simplify right side
   86,272x = 17,460,715,321
5. Step 5: Solve for x
   x = 17,460,715,321/86,272
6. Step 6: Final answer
   x = 202,391.45