Finding the Third Proportional to 71,700 and 100,290

Step by Step Solution

1. Step 1: Write the proportion equation
   71,700 : 100,290 = 100,290 : x
2. Step 2: Convert to fraction form
   71,700/100,290 = 100,290/x
3. Step 3: Cross multiply
   71,700x = 100,290 × 100,290
4. Step 4: Simplify right side
   71,700x = 10,058,084,100
5. Step 5: Solve for x
   x = 10,058,084,100/71,700
6. Step 6: Final answer
   x = 140,280.11