Finding the Fourth Proportional to 1,149.12, 1,725.56 and 1,090.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,149.12 : 1,725.56 = 1,090.69 : x
2. Step 2: Convert to fraction form
   1,149.12/1,725.56 = 1,090.69/x
3. Step 3: Cross multiply
   1,149.12x = 1,725.56 × 1,090.69
4. Step 4: Simplify right side
   1,149.12x = 1,882,051.04
5. Step 5: Solve for x
   x = 1,882,051.04/1,149.12
6. Step 6: Final answer
   x = 1,637.82