Finding the Fourth Proportional to 12,915, 17,822.88 and 7,326

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915 : 17,822.88 = 7,326 : x
2. Step 2: Convert to fraction form
   12,915/17,822.88 = 7,326/x
3. Step 3: Cross multiply
   12,915x = 17,822.88 × 7,326
4. Step 4: Simplify right side
   12,915x = 130,570,418.88
5. Step 5: Solve for x
   x = 130,570,418.88/12,915
6. Step 6: Final answer
   x = 10,109.98