Finding the Fourth Proportional to 3,128.58, 4,691.61 and 1,667.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.58 : 4,691.61 = 1,667.52 : x
2. Step 2: Convert to fraction form
   3,128.58/4,691.61 = 1,667.52/x
3. Step 3: Cross multiply
   3,128.58x = 4,691.61 × 1,667.52
4. Step 4: Simplify right side
   3,128.58x = 7,823,353.51
5. Step 5: Solve for x
   x = 7,823,353.51/3,128.58
6. Step 6: Final answer
   x = 2,500.61