Finding the Fourth Proportional to 1,587.21, 2,375.83 and 1,090.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,587.21 : 2,375.83 = 1,090.72 : x
2. Step 2: Convert to fraction form
   1,587.21/2,375.83 = 1,090.72/x
3. Step 3: Cross multiply
   1,587.21x = 2,375.83 × 1,090.72
4. Step 4: Simplify right side
   1,587.21x = 2,591,356.27
5. Step 5: Solve for x
   x = 2,591,356.27/1,587.21
6. Step 6: Final answer
   x = 1,632.65