Finding the Fourth Proportional to 3,139.40, 4,709.98 and 948.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.40 : 4,709.98 = 948.15 : x
2. Step 2: Convert to fraction form
   3,139.40/4,709.98 = 948.15/x
3. Step 3: Cross multiply
   3,139.40x = 4,709.98 × 948.15
4. Step 4: Simplify right side
   3,139.40x = 4,465,768.72
5. Step 5: Solve for x
   x = 4,465,768.72/3,139.40
6. Step 6: Final answer
   x = 1,422.49