Finding the Third Proportional to 38,909 and 86,890

Step by Step Solution

1. Step 1: Write the proportion equation
   38,909 : 86,890 = 86,890 : x
2. Step 2: Convert to fraction form
   38,909/86,890 = 86,890/x
3. Step 3: Cross multiply
   38,909x = 86,890 × 86,890
4. Step 4: Simplify right side
   38,909x = 7,549,872,100
5. Step 5: Solve for x
   x = 7,549,872,100/38,909
6. Step 6: Final answer
   x = 194,039.22