Finding the Fourth Proportional to 12,387.86, 18,584.63 and 5,369.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.86 : 18,584.63 = 5,369.05 : x
2. Step 2: Convert to fraction form
   12,387.86/18,584.63 = 5,369.05/x
3. Step 3: Cross multiply
   12,387.86x = 18,584.63 × 5,369.05
4. Step 4: Simplify right side
   12,387.86x = 99,781,780.86
5. Step 5: Solve for x
   x = 99,781,780.86/12,387.86
6. Step 6: Final answer
   x = 8,054.80