Finding the Third Proportional to 5,421.94 and 10,479.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,421.94 : 10,479.38 = 10,479.38 : x
2. Step 2: Convert to fraction form
   5,421.94/10,479.38 = 10,479.38/x
3. Step 3: Cross multiply
   5,421.94x = 10,479.38 × 10,479.38
4. Step 4: Simplify right side
   5,421.94x = 109,817,300.39
5. Step 5: Solve for x
   x = 109,817,300.39/5,421.94
6. Step 6: Final answer
   x = 20,254.25