Finding the Fourth Proportional to 11,986.25, 17,970.52 and 4,086.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,986.25 : 17,970.52 = 4,086.68 : x
2. Step 2: Convert to fraction form
   11,986.25/17,970.52 = 4,086.68/x
3. Step 3: Cross multiply
   11,986.25x = 17,970.52 × 4,086.68
4. Step 4: Simplify right side
   11,986.25x = 73,439,654.39
5. Step 5: Solve for x
   x = 73,439,654.39/11,986.25
6. Step 6: Final answer
   x = 6,126.99