Finding the Fourth Proportional to 1,581.03, 2,181.83 and 872.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.03 : 2,181.83 = 872.91 : x
2. Step 2: Convert to fraction form
   1,581.03/2,181.83 = 872.91/x
3. Step 3: Cross multiply
   1,581.03x = 2,181.83 × 872.91
4. Step 4: Simplify right side
   1,581.03x = 1,904,536.86
5. Step 5: Solve for x
   x = 1,904,536.86/1,581.03
6. Step 6: Final answer
   x = 1,204.62