Finding the Fourth Proportional to 2,181.67, 3,010.79 and 1,298.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.67 : 3,010.79 = 1,298.37 : x
2. Step 2: Convert to fraction form
   2,181.67/3,010.79 = 1,298.37/x
3. Step 3: Cross multiply
   2,181.67x = 3,010.79 × 1,298.37
4. Step 4: Simplify right side
   2,181.67x = 3,909,119.41
5. Step 5: Solve for x
   x = 3,909,119.41/2,181.67
6. Step 6: Final answer
   x = 1,791.80