Finding the Fourth Proportional to 36,872.68, 55,311.86 and 13,185.25

Step by Step Solution

1. Step 1: Write the proportion equation
   36,872.68 : 55,311.86 = 13,185.25 : x
2. Step 2: Convert to fraction form
   36,872.68/55,311.86 = 13,185.25/x
3. Step 3: Cross multiply
   36,872.68x = 55,311.86 × 13,185.25
4. Step 4: Simplify right side
   36,872.68x = 729,300,702.07
5. Step 5: Solve for x
   x = 729,300,702.07/36,872.68
6. Step 6: Final answer
   x = 19,778.89