Finding the Fourth Proportional to 1,581.04, 2,181.96 and 918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.04 : 2,181.96 = 918.10 : x
2. Step 2: Convert to fraction form
   1,581.04/2,181.96 = 918.10/x
3. Step 3: Cross multiply
   1,581.04x = 2,181.96 × 918.10
4. Step 4: Simplify right side
   1,581.04x = 2,003,257.48
5. Step 5: Solve for x
   x = 2,003,257.48/1,581.04
6. Step 6: Final answer
   x = 1,267.05