Finding the Fourth Proportional to 11,308.19, 15,559.43 and 9,284.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.19 : 15,559.43 = 9,284.15 : x
2. Step 2: Convert to fraction form
   11,308.19/15,559.43 = 9,284.15/x
3. Step 3: Cross multiply
   11,308.19x = 15,559.43 × 9,284.15
4. Step 4: Simplify right side
   11,308.19x = 144,455,957.82
5. Step 5: Solve for x
   x = 144,455,957.82/11,308.19
6. Step 6: Final answer
   x = 12,774.46