Finding the Third Proportional to 4,619.34 and 9,930.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,619.34 : 9,930.56 = 9,930.56 : x
2. Step 2: Convert to fraction form
   4,619.34/9,930.56 = 9,930.56/x
3. Step 3: Cross multiply
   4,619.34x = 9,930.56 × 9,930.56
4. Step 4: Simplify right side
   4,619.34x = 98,616,071.57
5. Step 5: Solve for x
   x = 98,616,071.57/4,619.34
6. Step 6: Final answer
   x = 21,348.50