Finding the Fourth Proportional to 2,181.15, 3,009.91 and 1,186.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.15 : 3,009.91 = 1,186.41 : x
2. Step 2: Convert to fraction form
   2,181.15/3,009.91 = 1,186.41/x
3. Step 3: Cross multiply
   2,181.15x = 3,009.91 × 1,186.41
4. Step 4: Simplify right side
   2,181.15x = 3,570,987.32
5. Step 5: Solve for x
   x = 3,570,987.32/2,181.15
6. Step 6: Final answer
   x = 1,637.20