Finding the Third Proportional to 2,142.56 and 2,385.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.56 : 2,385.56 = 2,385.56 : x
2. Step 2: Convert to fraction form
   2,142.56/2,385.56 = 2,385.56/x
3. Step 3: Cross multiply
   2,142.56x = 2,385.56 × 2,385.56
4. Step 4: Simplify right side
   2,142.56x = 5,690,908.44
5. Step 5: Solve for x
   x = 5,690,908.44/2,142.56
6. Step 6: Final answer
   x = 2,656.12