Finding the Fourth Proportional to 12,904.86, 17,809.02 and 7,315.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904.86 : 17,809.02 = 7,315.86 : x
2. Step 2: Convert to fraction form
   12,904.86/17,809.02 = 7,315.86/x
3. Step 3: Cross multiply
   12,904.86x = 17,809.02 × 7,315.86
4. Step 4: Simplify right side
   12,904.86x = 130,288,297.06
5. Step 5: Solve for x
   x = 130,288,297.06/12,904.86
6. Step 6: Final answer
   x = 10,096.06