Finding the Fourth Proportional to 7,898.83, 11,849.83 and 3,218.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,898.83 : 11,849.83 = 3,218.78 : x
2. Step 2: Convert to fraction form
   7,898.83/11,849.83 = 3,218.78/x
3. Step 3: Cross multiply
   7,898.83x = 11,849.83 × 3,218.78
4. Step 4: Simplify right side
   7,898.83x = 38,142,017.39
5. Step 5: Solve for x
   x = 38,142,017.39/7,898.83
6. Step 6: Final answer
   x = 4,828.82