Finding the Fourth Proportional to 12,818, 19,234.56 and 5,422

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818 : 19,234.56 = 5,422 : x
2. Step 2: Convert to fraction form
   12,818/19,234.56 = 5,422/x
3. Step 3: Cross multiply
   12,818x = 19,234.56 × 5,422
4. Step 4: Simplify right side
   12,818x = 104,289,784.32
5. Step 5: Solve for x
   x = 104,289,784.32/12,818
6. Step 6: Final answer
   x = 8,136.20