Finding the Fourth Proportional to 7,139.02, 10,708.34 and 3,189.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.02 : 10,708.34 = 3,189.28 : x
2. Step 2: Convert to fraction form
   7,139.02/10,708.34 = 3,189.28/x
3. Step 3: Cross multiply
   7,139.02x = 10,708.34 × 3,189.28
4. Step 4: Simplify right side
   7,139.02x = 34,151,894.60
5. Step 5: Solve for x
   x = 34,151,894.60/7,139.02
6. Step 6: Final answer
   x = 4,783.84