Finding the Fourth Proportional to 8,999.69, 12,419.54 and 5,020.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,999.69 : 12,419.54 = 5,020.56 : x
2. Step 2: Convert to fraction form
   8,999.69/12,419.54 = 5,020.56/x
3. Step 3: Cross multiply
   8,999.69x = 12,419.54 × 5,020.56
4. Step 4: Simplify right side
   8,999.69x = 62,353,051.69
5. Step 5: Solve for x
   x = 62,353,051.69/8,999.69
6. Step 6: Final answer
   x = 6,928.36