Finding the Fourth Proportional to 3,123.36, 4,678.56 and 1,820.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.36 : 4,678.56 = 1,820.88 : x
2. Step 2: Convert to fraction form
   3,123.36/4,678.56 = 1,820.88/x
3. Step 3: Cross multiply
   3,123.36x = 4,678.56 × 1,820.88
4. Step 4: Simplify right side
   3,123.36x = 8,519,096.33
5. Step 5: Solve for x
   x = 8,519,096.33/3,123.36
6. Step 6: Final answer
   x = 2,727.54