Finding the Fourth Proportional to 12,915, 17,823.78 and 7,327.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915 : 17,823.78 = 7,327.08 : x
2. Step 2: Convert to fraction form
   12,915/17,823.78 = 7,327.08/x
3. Step 3: Cross multiply
   12,915x = 17,823.78 × 7,327.08
4. Step 4: Simplify right side
   12,915x = 130,596,261.96
5. Step 5: Solve for x
   x = 130,596,261.96/12,915
6. Step 6: Final answer
   x = 10,111.98