Finding the Third Proportional to 12,210.75 and 19,424.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210.75 : 19,424.81 = 19,424.81 : x
2. Step 2: Convert to fraction form
   12,210.75/19,424.81 = 19,424.81/x
3. Step 3: Cross multiply
   12,210.75x = 19,424.81 × 19,424.81
4. Step 4: Simplify right side
   12,210.75x = 377,323,340.66
5. Step 5: Solve for x
   x = 377,323,340.66/12,210.75
6. Step 6: Final answer
   x = 30,900.91