Finding the Third Proportional to 55,170 and 87,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,170 : 87,400.50 = 87,400.50 : x
2. Step 2: Convert to fraction form
   55,170/87,400.50 = 87,400.50/x
3. Step 3: Cross multiply
   55,170x = 87,400.50 × 87,400.50
4. Step 4: Simplify right side
   55,170x = 7,638,847,400.25
5. Step 5: Solve for x
   x = 7,638,847,400.25/55,170
6. Step 6: Final answer
   x = 138,460.17