Finding the Third Proportional to 487.94 and 1,054.38

Step by Step Solution

1. Step 1: Write the proportion equation
   487.94 : 1,054.38 = 1,054.38 : x
2. Step 2: Convert to fraction form
   487.94/1,054.38 = 1,054.38/x
3. Step 3: Cross multiply
   487.94x = 1,054.38 × 1,054.38
4. Step 4: Simplify right side
   487.94x = 1,111,706.64
5. Step 5: Solve for x
   x = 1,111,706.64/487.94
6. Step 6: Final answer
   x = 2,278.38