Finding the Third Proportional to 55,086 and 85,140

Step by Step Solution

1. Step 1: Write the proportion equation
   55,086 : 85,140 = 85,140 : x
2. Step 2: Convert to fraction form
   55,086/85,140 = 85,140/x
3. Step 3: Cross multiply
   55,086x = 85,140 × 85,140
4. Step 4: Simplify right side
   55,086x = 7,248,819,600
5. Step 5: Solve for x
   x = 7,248,819,600/55,086
6. Step 6: Final answer
   x = 131,590.96