Finding the Third Proportional to 86,402 and 133,290

Step by Step Solution

1. Step 1: Write the proportion equation
   86,402 : 133,290 = 133,290 : x
2. Step 2: Convert to fraction form
   86,402/133,290 = 133,290/x
3. Step 3: Cross multiply
   86,402x = 133,290 × 133,290
4. Step 4: Simplify right side
   86,402x = 17,766,224,100
5. Step 5: Solve for x
   x = 17,766,224,100/86,402
6. Step 6: Final answer
   x = 205,622.83