Finding the Fourth Proportional to 5,486.02, 7,570.72 and 3,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,486.02 : 7,570.72 = 3,128.10 : x
2. Step 2: Convert to fraction form
   5,486.02/7,570.72 = 3,128.10/x
3. Step 3: Cross multiply
   5,486.02x = 7,570.72 × 3,128.10
4. Step 4: Simplify right side
   5,486.02x = 23,681,969.23
5. Step 5: Solve for x
   x = 23,681,969.23/5,486.02
6. Step 6: Final answer
   x = 4,316.79