Finding the Fourth Proportional to 12,784.72, 19,183.97 and 5,394.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.72 : 19,183.97 = 5,394.30 : x
2. Step 2: Convert to fraction form
   12,784.72/19,183.97 = 5,394.30/x
3. Step 3: Cross multiply
   12,784.72x = 19,183.97 × 5,394.30
4. Step 4: Simplify right side
   12,784.72x = 103,484,089.37
5. Step 5: Solve for x
   x = 103,484,089.37/12,784.72
6. Step 6: Final answer
   x = 8,094.36