Finding the Fourth Proportional to 3,139.07, 4,708.76 and 1,191.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.07 : 4,708.76 = 1,191.42 : x
2. Step 2: Convert to fraction form
   3,139.07/4,708.76 = 1,191.42/x
3. Step 3: Cross multiply
   3,139.07x = 4,708.76 × 1,191.42
4. Step 4: Simplify right side
   3,139.07x = 5,610,104.88
5. Step 5: Solve for x
   x = 5,610,104.88/3,139.07
6. Step 6: Final answer
   x = 1,787.19