Finding the Fourth Proportional to 12,892.92, 17,792.38 and 7,856.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,892.92 : 17,792.38 = 7,856.48 : x
2. Step 2: Convert to fraction form
   12,892.92/17,792.38 = 7,856.48/x
3. Step 3: Cross multiply
   12,892.92x = 17,792.38 × 7,856.48
4. Step 4: Simplify right side
   12,892.92x = 139,785,477.62
5. Step 5: Solve for x
   x = 139,785,477.62/12,892.92
6. Step 6: Final answer
   x = 10,842.03