Finding the Fourth Proportional to 8,483.58, 12,728.61 and 4,789.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,483.58 : 12,728.61 = 4,789.98 : x
2. Step 2: Convert to fraction form
   8,483.58/12,728.61 = 4,789.98/x
3. Step 3: Cross multiply
   8,483.58x = 12,728.61 × 4,789.98
4. Step 4: Simplify right side
   8,483.58x = 60,969,787.33
5. Step 5: Solve for x
   x = 60,969,787.33/8,483.58
6. Step 6: Final answer
   x = 7,186.80