Finding the Fourth Proportional to 3,429.78, 5,145.58 and 1,785.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.78 : 5,145.58 = 1,785.84 : x
2. Step 2: Convert to fraction form
   3,429.78/5,145.58 = 1,785.84/x
3. Step 3: Cross multiply
   3,429.78x = 5,145.58 × 1,785.84
4. Step 4: Simplify right side
   3,429.78x = 9,189,182.59
5. Step 5: Solve for x
   x = 9,189,182.59/3,429.78
6. Step 6: Final answer
   x = 2,679.23