Finding the Third Proportional to 13,618.13 and 21,399.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,618.13 : 21,399.19 = 21,399.19 : x
2. Step 2: Convert to fraction form
   13,618.13/21,399.19 = 21,399.19/x
3. Step 3: Cross multiply
   13,618.13x = 21,399.19 × 21,399.19
4. Step 4: Simplify right side
   13,618.13x = 457,925,225.66
5. Step 5: Solve for x
   x = 457,925,225.66/13,618.13
6. Step 6: Final answer
   x = 33,626.16