Finding the Fourth Proportional to 9,619.88, 13,284.42 and 7,079.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.88 : 13,284.42 = 7,079.72 : x
2. Step 2: Convert to fraction form
   9,619.88/13,284.42 = 7,079.72/x
3. Step 3: Cross multiply
   9,619.88x = 13,284.42 × 7,079.72
4. Step 4: Simplify right side
   9,619.88x = 94,049,973.96
5. Step 5: Solve for x
   x = 94,049,973.96/9,619.88
6. Step 6: Final answer
   x = 9,776.63