Finding the Fourth Proportional to 8,999.81, 12,419.71 and 5,020.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,999.81 : 12,419.71 = 5,020.69 : x
2. Step 2: Convert to fraction form
   8,999.81/12,419.71 = 5,020.69/x
3. Step 3: Cross multiply
   8,999.81x = 12,419.71 × 5,020.69
4. Step 4: Simplify right side
   8,999.81x = 62,355,470.20
5. Step 5: Solve for x
   x = 62,355,470.20/8,999.81
6. Step 6: Final answer
   x = 6,928.53