Finding the Fourth Proportional to 9,079.69, 13,601.31 and 6,619.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,079.69 : 13,601.31 = 6,619.72 : x
2. Step 2: Convert to fraction form
   9,079.69/13,601.31 = 6,619.72/x
3. Step 3: Cross multiply
   9,079.69x = 13,601.31 × 6,619.72
4. Step 4: Simplify right side
   9,079.69x = 90,036,863.83
5. Step 5: Solve for x
   x = 90,036,863.83/9,079.69
6. Step 6: Final answer
   x = 9,916.29