Finding the Fourth Proportional to 7,139.42, 10,711.67 and 3,190.32

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.42 : 10,711.67 = 3,190.32 : x
2. Step 2: Convert to fraction form
   7,139.42/10,711.67 = 3,190.32/x
3. Step 3: Cross multiply
   7,139.42x = 10,711.67 × 3,190.32
4. Step 4: Simplify right side
   7,139.42x = 34,173,655.03
5. Step 5: Solve for x
   x = 34,173,655.03/7,139.42
6. Step 6: Final answer
   x = 4,786.62