Finding the Fourth Proportional to 12,801.86, 19,205.39 and 5,406.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,801.86 : 19,205.39 = 5,406.29 : x
2. Step 2: Convert to fraction form
   12,801.86/19,205.39 = 5,406.29/x
3. Step 3: Cross multiply
   12,801.86x = 19,205.39 × 5,406.29
4. Step 4: Simplify right side
   12,801.86x = 103,829,880.87
5. Step 5: Solve for x
   x = 103,829,880.87/12,801.86
6. Step 6: Final answer
   x = 8,110.53