Finding the Fourth Proportional to 3,859.58, 5,789.01 and 1,667.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.58 : 5,789.01 = 1,667.90 : x
2. Step 2: Convert to fraction form
   3,859.58/5,789.01 = 1,667.90/x
3. Step 3: Cross multiply
   3,859.58x = 5,789.01 × 1,667.90
4. Step 4: Simplify right side
   3,859.58x = 9,655,489.78
5. Step 5: Solve for x
   x = 9,655,489.78/3,859.58
6. Step 6: Final answer
   x = 2,501.69