Finding the Fourth Proportional to 13,186.71, 19,776.42 and 9,026.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,186.71 : 19,776.42 = 9,026.28 : x
2. Step 2: Convert to fraction form
   13,186.71/19,776.42 = 9,026.28/x
3. Step 3: Cross multiply
   13,186.71x = 19,776.42 × 9,026.28
4. Step 4: Simplify right side
   13,186.71x = 178,507,504.32
5. Step 5: Solve for x
   x = 178,507,504.32/13,186.71
6. Step 6: Final answer
   x = 13,536.93