Finding the Fourth Proportional to 12,986.27, 19,467.71 and 4,664.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.27 : 19,467.71 = 4,664.33 : x
2. Step 2: Convert to fraction form
   12,986.27/19,467.71 = 4,664.33/x
3. Step 3: Cross multiply
   12,986.27x = 19,467.71 × 4,664.33
4. Step 4: Simplify right side
   12,986.27x = 90,803,823.78
5. Step 5: Solve for x
   x = 90,803,823.78/12,986.27
6. Step 6: Final answer
   x = 6,992.29