Finding the Third Proportional to 56,170 and 122,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,170 : 122,890.50 = 122,890.50 : x
2. Step 2: Convert to fraction form
   56,170/122,890.50 = 122,890.50/x
3. Step 3: Cross multiply
   56,170x = 122,890.50 × 122,890.50
4. Step 4: Simplify right side
   56,170x = 15,102,074,990.25
5. Step 5: Solve for x
   x = 15,102,074,990.25/56,170
6. Step 6: Final answer
   x = 268,863.72