Finding the Fourth Proportional to 1,587.47, 2,189.69 and 1,090.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.47 : 2,189.69 = 1,090.38 : x
2. Step 2: Convert to fraction form
   1,587.47/2,189.69 = 1,090.38/x
3. Step 3: Cross multiply
   1,587.47x = 2,189.69 × 1,090.38
4. Step 4: Simplify right side
   1,587.47x = 2,387,588.73
5. Step 5: Solve for x
   x = 2,387,588.73/1,587.47
6. Step 6: Final answer
   x = 1,504.03