Finding the Fourth Proportional to 21,766.16, 30,026.76 and 13,368.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,766.16 : 30,026.76 = 13,368.08 : x
2. Step 2: Convert to fraction form
   21,766.16/30,026.76 = 13,368.08/x
3. Step 3: Cross multiply
   21,766.16x = 30,026.76 × 13,368.08
4. Step 4: Simplify right side
   21,766.16x = 401,400,129.82
5. Step 5: Solve for x
   x = 401,400,129.82/21,766.16
6. Step 6: Final answer
   x = 18,441.48