Finding the Fourth Proportional to 2,181.74, 3,010.81 and 1,187.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.74 : 3,010.81 = 1,187.02 : x
2. Step 2: Convert to fraction form
   2,181.74/3,010.81 = 1,187.02/x
3. Step 3: Cross multiply
   2,181.74x = 3,010.81 × 1,187.02
4. Step 4: Simplify right side
   2,181.74x = 3,573,891.69
5. Step 5: Solve for x
   x = 3,573,891.69/2,181.74
6. Step 6: Final answer
   x = 1,638.09