Finding the Fourth Proportional to 2,090.46, 3,139.72 and 1,270.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.46 : 3,139.72 = 1,270.32 : x
2. Step 2: Convert to fraction form
   2,090.46/3,139.72 = 1,270.32/x
3. Step 3: Cross multiply
   2,090.46x = 3,139.72 × 1,270.32
4. Step 4: Simplify right side
   2,090.46x = 3,988,449.11
5. Step 5: Solve for x
   x = 3,988,449.11/2,090.46
6. Step 6: Final answer
   x = 1,907.93