Finding the Third Proportional to 56,113.50 and 122,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,113.50 : 122,788.50 = 122,788.50 : x
2. Step 2: Convert to fraction form
   56,113.50/122,788.50 = 122,788.50/x
3. Step 3: Cross multiply
   56,113.50x = 122,788.50 × 122,788.50
4. Step 4: Simplify right side
   56,113.50x = 15,077,015,732.25
5. Step 5: Solve for x
   x = 15,077,015,732.25/56,113.50
6. Step 6: Final answer
   x = 268,687.85