Finding the Third Proportional to 1,142.44 and 2,421.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.44 : 2,421.56 = 2,421.56 : x
2. Step 2: Convert to fraction form
   1,142.44/2,421.56 = 2,421.56/x
3. Step 3: Cross multiply
   1,142.44x = 2,421.56 × 2,421.56
4. Step 4: Simplify right side
   1,142.44x = 5,863,964.94
5. Step 5: Solve for x
   x = 5,863,964.94/1,142.44
6. Step 6: Final answer
   x = 5,132.85