Finding the Fourth Proportional to 3,139.30, 4,332.72 and 2,258.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.30 : 4,332.72 = 2,258.02 : x
2. Step 2: Convert to fraction form
   3,139.30/4,332.72 = 2,258.02/x
3. Step 3: Cross multiply
   3,139.30x = 4,332.72 × 2,258.02
4. Step 4: Simplify right side
   3,139.30x = 9,783,368.41
5. Step 5: Solve for x
   x = 9,783,368.41/3,139.30
6. Step 6: Final answer
   x = 3,116.42