Finding the Fourth Proportional to 3,139.86, 4,709.82 and 948.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.86 : 4,709.82 = 948.62 : x
2. Step 2: Convert to fraction form
   3,139.86/4,709.82 = 948.62/x
3. Step 3: Cross multiply
   3,139.86x = 4,709.82 × 948.62
4. Step 4: Simplify right side
   3,139.86x = 4,467,829.45
5. Step 5: Solve for x
   x = 4,467,829.45/3,139.86
6. Step 6: Final answer
   x = 1,422.94