Finding the Third Proportional to 55,564.31 and 123,138.56

Step by Step Solution

1. Step 1: Write the proportion equation
   55,564.31 : 123,138.56 = 123,138.56 : x
2. Step 2: Convert to fraction form
   55,564.31/123,138.56 = 123,138.56/x
3. Step 3: Cross multiply
   55,564.31x = 123,138.56 × 123,138.56
4. Step 4: Simplify right side
   55,564.31x = 15,163,105,574.57
5. Step 5: Solve for x
   x = 15,163,105,574.57/55,564.31
6. Step 6: Final answer
   x = 272,892.89