Finding the Fourth Proportional to 7,128.06, 9,836.56 and 3,984.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.06 : 9,836.56 = 3,984.24 : x
2. Step 2: Convert to fraction form
   7,128.06/9,836.56 = 3,984.24/x
3. Step 3: Cross multiply
   7,128.06x = 9,836.56 × 3,984.24
4. Step 4: Simplify right side
   7,128.06x = 39,191,215.81
5. Step 5: Solve for x
   x = 39,191,215.81/7,128.06
6. Step 6: Final answer
   x = 5,498.16