Finding the Fourth Proportional to 12,940.58, 19,399.47 and 8,548.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.58 : 19,399.47 = 8,548.82 : x
2. Step 2: Convert to fraction form
   12,940.58/19,399.47 = 8,548.82/x
3. Step 3: Cross multiply
   12,940.58x = 19,399.47 × 8,548.82
4. Step 4: Simplify right side
   12,940.58x = 165,842,577.13
5. Step 5: Solve for x
   x = 165,842,577.13/12,940.58
6. Step 6: Final answer
   x = 12,815.70