Finding the Third Proportional to 4,559.63 and 9,900.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,559.63 : 9,900.56 = 9,900.56 : x
2. Step 2: Convert to fraction form
   4,559.63/9,900.56 = 9,900.56/x
3. Step 3: Cross multiply
   4,559.63x = 9,900.56 × 9,900.56
4. Step 4: Simplify right side
   4,559.63x = 98,021,137.82
5. Step 5: Solve for x
   x = 98,021,137.82/4,559.63
6. Step 6: Final answer
   x = 21,497.63