Finding the Fourth Proportional to 2,390.02, 3,584.22 and 1,090.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.02 : 3,584.22 = 1,090.78 : x
2. Step 2: Convert to fraction form
   2,390.02/3,584.22 = 1,090.78/x
3. Step 3: Cross multiply
   2,390.02x = 3,584.22 × 1,090.78
4. Step 4: Simplify right side
   2,390.02x = 3,909,595.49
5. Step 5: Solve for x
   x = 3,909,595.49/2,390.02
6. Step 6: Final answer
   x = 1,635.80