Finding the Fourth Proportional to 13,986.18, 19,300.77 and 8,397.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,986.18 : 19,300.77 = 8,397.18 : x
2. Step 2: Convert to fraction form
   13,986.18/19,300.77 = 8,397.18/x
3. Step 3: Cross multiply
   13,986.18x = 19,300.77 × 8,397.18
4. Step 4: Simplify right side
   13,986.18x = 162,072,039.83
5. Step 5: Solve for x
   x = 162,072,039.83/13,986.18
6. Step 6: Final answer
   x = 11,588.01