Finding the Fourth Proportional to 12,853.62, 19,287.72 and 7,935.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,853.62 : 19,287.72 = 7,935.30 : x
2. Step 2: Convert to fraction form
   12,853.62/19,287.72 = 7,935.30/x
3. Step 3: Cross multiply
   12,853.62x = 19,287.72 × 7,935.30
4. Step 4: Simplify right side
   12,853.62x = 153,053,844.52
5. Step 5: Solve for x
   x = 153,053,844.52/12,853.62
6. Step 6: Final answer
   x = 11,907.45