Finding the Third Proportional to 55,297.69 and 85,072.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,297.69 : 85,072.78 = 85,072.78 : x
2. Step 2: Convert to fraction form
   55,297.69/85,072.78 = 85,072.78/x
3. Step 3: Cross multiply
   55,297.69x = 85,072.78 × 85,072.78
4. Step 4: Simplify right side
   55,297.69x = 7,237,378,109.61
5. Step 5: Solve for x
   x = 7,237,378,109.61/55,297.69
6. Step 6: Final answer
   x = 130,880.30