Finding the Third Proportional to 23,820 and 55,387

Step by Step Solution

1. Step 1: Write the proportion equation
   23,820 : 55,387 = 55,387 : x
2. Step 2: Convert to fraction form
   23,820/55,387 = 55,387/x
3. Step 3: Cross multiply
   23,820x = 55,387 × 55,387
4. Step 4: Simplify right side
   23,820x = 3,067,719,769
5. Step 5: Solve for x
   x = 3,067,719,769/23,820
6. Step 6: Final answer
   x = 128,787.56