Finding the Fourth Proportional to 12,928.31, 17,843.01 and 7,895.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.31 : 17,843.01 = 7,895.45 : x
2. Step 2: Convert to fraction form
   12,928.31/17,843.01 = 7,895.45/x
3. Step 3: Cross multiply
   12,928.31x = 17,843.01 × 7,895.45
4. Step 4: Simplify right side
   12,928.31x = 140,878,593.30
5. Step 5: Solve for x
   x = 140,878,593.30/12,928.31
6. Step 6: Final answer
   x = 10,896.91