Finding the Third Proportional to 13,816.13 and 21,431.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,816.13 : 21,431.25 = 21,431.25 : x
2. Step 2: Convert to fraction form
   13,816.13/21,431.25 = 21,431.25/x
3. Step 3: Cross multiply
   13,816.13x = 21,431.25 × 21,431.25
4. Step 4: Simplify right side
   13,816.13x = 459,298,476.56
5. Step 5: Solve for x
   x = 459,298,476.56/13,816.13
6. Step 6: Final answer
   x = 33,243.65