Finding the Fourth Proportional to 8,090, 12,128.48 and 3,476.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,090 : 12,128.48 = 3,476.24 : x
2. Step 2: Convert to fraction form
   8,090/12,128.48 = 3,476.24/x
3. Step 3: Cross multiply
   8,090x = 12,128.48 × 3,476.24
4. Step 4: Simplify right side
   8,090x = 42,161,507.32
5. Step 5: Solve for x
   x = 42,161,507.32/8,090
6. Step 6: Final answer
   x = 5,211.56