Finding the Fourth Proportional to 13,086.40, 19,626.67 and 3,726.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.40 : 19,626.67 = 3,726.21 : x
2. Step 2: Convert to fraction form
   13,086.40/19,626.67 = 3,726.21/x
3. Step 3: Cross multiply
   13,086.40x = 19,626.67 × 3,726.21
4. Step 4: Simplify right side
   13,086.40x = 73,133,094.02
5. Step 5: Solve for x
   x = 73,133,094.02/13,086.40
6. Step 6: Final answer
   x = 5,588.48