Finding the Third Proportional to 4,479,360 and 9,705,216

Step by Step Solution

1. Step 1: Write the proportion equation
   4,479,360 : 9,705,216 = 9,705,216 : x
2. Step 2: Convert to fraction form
   4,479,360/9,705,216 = 9,705,216/x
3. Step 3: Cross multiply
   4,479,360x = 9,705,216 × 9,705,216
4. Step 4: Simplify right side
   4,479,360x = 94,191,217,606,656
5. Step 5: Solve for x
   x = 94,191,217,606,656/4,479,360
6. Step 6: Final answer
   x = 21,027,829.33