Finding the Third Proportional to 56,120 and 123,310

Step by Step Solution

1. Step 1: Write the proportion equation
   56,120 : 123,310 = 123,310 : x
2. Step 2: Convert to fraction form
   56,120/123,310 = 123,310/x
3. Step 3: Cross multiply
   56,120x = 123,310 × 123,310
4. Step 4: Simplify right side
   56,120x = 15,205,356,100
5. Step 5: Solve for x
   x = 15,205,356,100/56,120
6. Step 6: Final answer
   x = 270,943.62