Finding the Fourth Proportional to 12,789.08, 19,186.20 and 5,393.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.08 : 19,186.20 = 5,393.52 : x
2. Step 2: Convert to fraction form
   12,789.08/19,186.20 = 5,393.52/x
3. Step 3: Cross multiply
   12,789.08x = 19,186.20 × 5,393.52
4. Step 4: Simplify right side
   12,789.08x = 103,481,153.42
5. Step 5: Solve for x
   x = 103,481,153.42/12,789.08
6. Step 6: Final answer
   x = 8,091.37