Finding the Fourth Proportional to 12,800.08, 19,200.06 and 5,402.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,800.08 : 19,200.06 = 5,402.56 : x
2. Step 2: Convert to fraction form
   12,800.08/19,200.06 = 5,402.56/x
3. Step 3: Cross multiply
   12,800.08x = 19,200.06 × 5,402.56
4. Step 4: Simplify right side
   12,800.08x = 103,729,476.15
5. Step 5: Solve for x
   x = 103,729,476.15/12,800.08
6. Step 6: Final answer
   x = 8,103.81