Finding the Fourth Proportional to 3,139.76, 4,709.51 and 948.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.76 : 4,709.51 = 948.42 : x
2. Step 2: Convert to fraction form
   3,139.76/4,709.51 = 948.42/x
3. Step 3: Cross multiply
   3,139.76x = 4,709.51 × 948.42
4. Step 4: Simplify right side
   3,139.76x = 4,466,588.73
5. Step 5: Solve for x
   x = 4,466,588.73/3,139.76
6. Step 6: Final answer
   x = 1,422.59