Finding the Fourth Proportional to 2,180.82, 3,009.24 and 1,296.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.82 : 3,009.24 = 1,296.30 : x
2. Step 2: Convert to fraction form
   2,180.82/3,009.24 = 1,296.30/x
3. Step 3: Cross multiply
   2,180.82x = 3,009.24 × 1,296.30
4. Step 4: Simplify right side
   2,180.82x = 3,900,877.81
5. Step 5: Solve for x
   x = 3,900,877.81/2,180.82
6. Step 6: Final answer
   x = 1,788.72