Finding the Fourth Proportional to 12,814.00, 19,223.12 and 5,418.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,814.00 : 19,223.12 = 5,418.56 : x
2. Step 2: Convert to fraction form
   12,814.00/19,223.12 = 5,418.56/x
3. Step 3: Cross multiply
   12,814.00x = 19,223.12 × 5,418.56
4. Step 4: Simplify right side
   12,814.00x = 104,161,690.71
5. Step 5: Solve for x
   x = 104,161,690.71/12,814.00
6. Step 6: Final answer
   x = 8,128.74