Finding the Fourth Proportional to 7,128.63, 9,837.51 and 3,984.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.63 : 9,837.51 = 3,984.82 : x
2. Step 2: Convert to fraction form
   7,128.63/9,837.51 = 3,984.82/x
3. Step 3: Cross multiply
   7,128.63x = 9,837.51 × 3,984.82
4. Step 4: Simplify right side
   7,128.63x = 39,200,722.75
5. Step 5: Solve for x
   x = 39,200,722.75/7,128.63
6. Step 6: Final answer
   x = 5,499.05