Finding the Fourth Proportional to 9,019.71, 12,447.11 and 4,986.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.71 : 12,447.11 = 4,986.80 : x
2. Step 2: Convert to fraction form
   9,019.71/12,447.11 = 4,986.80/x
3. Step 3: Cross multiply
   9,019.71x = 12,447.11 × 4,986.80
4. Step 4: Simplify right side
   9,019.71x = 62,071,160.98
5. Step 5: Solve for x
   x = 62,071,160.98/9,019.71
6. Step 6: Final answer
   x = 6,881.72