Finding the Fourth Proportional to 12,986.52, 19,474.38 and 5,587.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.52 : 19,474.38 = 5,587.08 : x
2. Step 2: Convert to fraction form
   12,986.52/19,474.38 = 5,587.08/x
3. Step 3: Cross multiply
   12,986.52x = 19,474.38 × 5,587.08
4. Step 4: Simplify right side
   12,986.52x = 108,804,919.01
5. Step 5: Solve for x
   x = 108,804,919.01/12,986.52
6. Step 6: Final answer
   x = 8,378.30