Finding the Third Proportional to 2,475.56 and 5,378.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,475.56 : 5,378.91 = 5,378.91 : x
2. Step 2: Convert to fraction form
   2,475.56/5,378.91 = 5,378.91/x
3. Step 3: Cross multiply
   2,475.56x = 5,378.91 × 5,378.91
4. Step 4: Simplify right side
   2,475.56x = 28,932,632.45
5. Step 5: Solve for x
   x = 28,932,632.45/2,475.56
6. Step 6: Final answer
   x = 11,687.30