Finding the Fourth Proportional to 12,895.53, 17,794.23 and 7,857.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,895.53 : 17,794.23 = 7,857.91 : x
2. Step 2: Convert to fraction form
   12,895.53/17,794.23 = 7,857.91/x
3. Step 3: Cross multiply
   12,895.53x = 17,794.23 × 7,857.91
4. Step 4: Simplify right side
   12,895.53x = 139,825,457.86
5. Step 5: Solve for x
   x = 139,825,457.86/12,895.53
6. Step 6: Final answer
   x = 10,842.94