Finding the Third Proportional to 986.06 and 2,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   986.06 : 2,142.56 = 2,142.56 : x
2. Step 2: Convert to fraction form
   986.06/2,142.56 = 2,142.56/x
3. Step 3: Cross multiply
   986.06x = 2,142.56 × 2,142.56
4. Step 4: Simplify right side
   986.06x = 4,590,574.07
5. Step 5: Solve for x
   x = 4,590,574.07/986.06
6. Step 6: Final answer
   x = 4,655.46