Finding the Fourth Proportional to 9,511.52, 13,112.72 and 8,199.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,511.52 : 13,112.72 = 8,199.20 : x
2. Step 2: Convert to fraction form
   9,511.52/13,112.72 = 8,199.20/x
3. Step 3: Cross multiply
   9,511.52x = 13,112.72 × 8,199.20
4. Step 4: Simplify right side
   9,511.52x = 107,513,813.82
5. Step 5: Solve for x
   x = 107,513,813.82/9,511.52
6. Step 6: Final answer
   x = 11,303.54