Finding the Fourth Proportional to 13,086.09, 19,629.78 and 3,726.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.09 : 19,629.78 = 3,726.78 : x
2. Step 2: Convert to fraction form
   13,086.09/19,629.78 = 3,726.78/x
3. Step 3: Cross multiply
   13,086.09x = 19,629.78 × 3,726.78
4. Step 4: Simplify right side
   13,086.09x = 73,155,871.51
5. Step 5: Solve for x
   x = 73,155,871.51/13,086.09
6. Step 6: Final answer
   x = 5,590.35