Finding the Fourth Proportional to 12,495.32, 17,249.10 and 9,511.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,495.32 : 17,249.10 = 9,511.28 : x
2. Step 2: Convert to fraction form
   12,495.32/17,249.10 = 9,511.28/x
3. Step 3: Cross multiply
   12,495.32x = 17,249.10 × 9,511.28
4. Step 4: Simplify right side
   12,495.32x = 164,061,027.30
5. Step 5: Solve for x
   x = 164,061,027.30/12,495.32
6. Step 6: Final answer
   x = 13,129.80