Finding the Third Proportional to 55,862 and 86,890

Step by Step Solution

1. Step 1: Write the proportion equation
   55,862 : 86,890 = 86,890 : x
2. Step 2: Convert to fraction form
   55,862/86,890 = 86,890/x
3. Step 3: Cross multiply
   55,862x = 86,890 × 86,890
4. Step 4: Simplify right side
   55,862x = 7,549,872,100
5. Step 5: Solve for x
   x = 7,549,872,100/55,862
6. Step 6: Final answer
   x = 135,152.20