Finding the Fourth Proportional to 1,613.58, 2,227.42 and 1,090.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.58 : 2,227.42 = 1,090.32 : x
2. Step 2: Convert to fraction form
   1,613.58/2,227.42 = 1,090.32/x
3. Step 3: Cross multiply
   1,613.58x = 2,227.42 × 1,090.32
4. Step 4: Simplify right side
   1,613.58x = 2,428,589.50
5. Step 5: Solve for x
   x = 2,428,589.50/1,613.58
6. Step 6: Final answer
   x = 1,505.10