Finding the Fourth Proportional to 12,928.95, 17,843.59 and 7,892.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.95 : 17,843.59 = 7,892.09 : x
2. Step 2: Convert to fraction form
   12,928.95/17,843.59 = 7,892.09/x
3. Step 3: Cross multiply
   12,928.95x = 17,843.59 × 7,892.09
4. Step 4: Simplify right side
   12,928.95x = 140,823,109.25
5. Step 5: Solve for x
   x = 140,823,109.25/12,928.95
6. Step 6: Final answer
   x = 10,892.08