Finding the Third Proportional to 9,355.50 and 21,930.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.50 : 21,930.75 = 21,930.75 : x
2. Step 2: Convert to fraction form
   9,355.50/21,930.75 = 21,930.75/x
3. Step 3: Cross multiply
   9,355.50x = 21,930.75 × 21,930.75
4. Step 4: Simplify right side
   9,355.50x = 480,957,795.56
5. Step 5: Solve for x
   x = 480,957,795.56/9,355.50
6. Step 6: Final answer
   x = 51,409.10