Finding the Fourth Proportional to 2,385.82, 3,579.30 and 998.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.82 : 3,579.30 = 998.38 : x
2. Step 2: Convert to fraction form
   2,385.82/3,579.30 = 998.38/x
3. Step 3: Cross multiply
   2,385.82x = 3,579.30 × 998.38
4. Step 4: Simplify right side
   2,385.82x = 3,573,496.54
5. Step 5: Solve for x
   x = 3,573,496.54/2,385.82
6. Step 6: Final answer
   x = 1,497.81