Finding the Third Proportional to 12,210.75 and 30,390.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210.75 : 30,390.19 = 30,390.19 : x
2. Step 2: Convert to fraction form
   12,210.75/30,390.19 = 30,390.19/x
3. Step 3: Cross multiply
   12,210.75x = 30,390.19 × 30,390.19
4. Step 4: Simplify right side
   12,210.75x = 923,563,496.29
5. Step 5: Solve for x
   x = 923,563,496.29/12,210.75
6. Step 6: Final answer
   x = 75,635.28