Finding the Fourth Proportional to 12,813.82, 19,222.77 and 5,418.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,813.82 : 19,222.77 = 5,418.34 : x
2. Step 2: Convert to fraction form
   12,813.82/19,222.77 = 5,418.34/x
3. Step 3: Cross multiply
   12,813.82x = 19,222.77 × 5,418.34
4. Step 4: Simplify right side
   12,813.82x = 104,155,503.60
5. Step 5: Solve for x
   x = 104,155,503.60/12,813.82
6. Step 6: Final answer
   x = 8,128.37