Finding the Third Proportional to 13,258.69 and 21,873.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,258.69 : 21,873.80 = 21,873.80 : x
2. Step 2: Convert to fraction form
   13,258.69/21,873.80 = 21,873.80/x
3. Step 3: Cross multiply
   13,258.69x = 21,873.80 × 21,873.80
4. Step 4: Simplify right side
   13,258.69x = 478,462,989.73
5. Step 5: Solve for x
   x = 478,462,989.73/13,258.69
6. Step 6: Final answer
   x = 36,086.75