Finding the Fourth Proportional to 2,181.79, 3,009.88 and 1,297.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.79 : 3,009.88 = 1,297.09 : x
2. Step 2: Convert to fraction form
   2,181.79/3,009.88 = 1,297.09/x
3. Step 3: Cross multiply
   2,181.79x = 3,009.88 × 1,297.09
4. Step 4: Simplify right side
   2,181.79x = 3,904,085.25
5. Step 5: Solve for x
   x = 3,904,085.25/2,181.79
6. Step 6: Final answer
   x = 1,789.40