Finding the Fourth Proportional to 12,788.56, 19,187.52 and 5,394.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.56 : 19,187.52 = 5,394.88 : x
2. Step 2: Convert to fraction form
   12,788.56/19,187.52 = 5,394.88/x
3. Step 3: Cross multiply
   12,788.56x = 19,187.52 × 5,394.88
4. Step 4: Simplify right side
   12,788.56x = 103,514,367.90
5. Step 5: Solve for x
   x = 103,514,367.90/12,788.56
6. Step 6: Final answer
   x = 8,094.29