Finding the Fourth Proportional to 12,798.73, 19,200.12 and 4,478.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,798.73 : 19,200.12 = 4,478.54 : x
2. Step 2: Convert to fraction form
   12,798.73/19,200.12 = 4,478.54/x
3. Step 3: Cross multiply
   12,798.73x = 19,200.12 × 4,478.54
4. Step 4: Simplify right side
   12,798.73x = 85,988,483.03
5. Step 5: Solve for x
   x = 85,988,483.03/12,798.73
6. Step 6: Final answer
   x = 6,718.52