Finding the Fourth Proportional to 2,215.38, 3,056.76 and 1,330.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.38 : 3,056.76 = 1,330.86 : x
2. Step 2: Convert to fraction form
   2,215.38/3,056.76 = 1,330.86/x
3. Step 3: Cross multiply
   2,215.38x = 3,056.76 × 1,330.86
4. Step 4: Simplify right side
   2,215.38x = 4,068,119.61
5. Step 5: Solve for x
   x = 4,068,119.61/2,215.38
6. Step 6: Final answer
   x = 1,836.31