Finding the Fourth Proportional to 2,388.16, 3,580.56 and 1,090.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.16 : 3,580.56 = 1,090.72 : x
2. Step 2: Convert to fraction form
   2,388.16/3,580.56 = 1,090.72/x
3. Step 3: Cross multiply
   2,388.16x = 3,580.56 × 1,090.72
4. Step 4: Simplify right side
   2,388.16x = 3,905,388.40
5. Step 5: Solve for x
   x = 3,905,388.40/2,388.16
6. Step 6: Final answer
   x = 1,635.31