Finding the Fourth Proportional to 2,215.09, 3,056.82 and 1,330.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.09 : 3,056.82 = 1,330.89 : x
2. Step 2: Convert to fraction form
   2,215.09/3,056.82 = 1,330.89/x
3. Step 3: Cross multiply
   2,215.09x = 3,056.82 × 1,330.89
4. Step 4: Simplify right side
   2,215.09x = 4,068,272.56
5. Step 5: Solve for x
   x = 4,068,272.56/2,215.09
6. Step 6: Final answer
   x = 1,836.62