Finding the Fourth Proportional to 9,019.90, 12,447.37 and 4,986.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.90 : 12,447.37 = 4,986.71 : x
2. Step 2: Convert to fraction form
   9,019.90/12,447.37 = 4,986.71/x
3. Step 3: Cross multiply
   9,019.90x = 12,447.37 × 4,986.71
4. Step 4: Simplify right side
   9,019.90x = 62,071,399.52
5. Step 5: Solve for x
   x = 62,071,399.52/9,019.90
6. Step 6: Final answer
   x = 6,881.61