Finding the Fourth Proportional to 10,859.91, 14,986.67 and 5,891.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,859.91 : 14,986.67 = 5,891.91 : x
2. Step 2: Convert to fraction form
   10,859.91/14,986.67 = 5,891.91/x
3. Step 3: Cross multiply
   10,859.91x = 14,986.67 × 5,891.91
4. Step 4: Simplify right side
   10,859.91x = 88,300,058.32
5. Step 5: Solve for x
   x = 88,300,058.32/10,859.91
6. Step 6: Final answer
   x = 8,130.83