Finding the Fourth Proportional to 1,627.11, 2,245.43 and 881.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.11 : 2,245.43 = 881.09 : x
2. Step 2: Convert to fraction form
   1,627.11/2,245.43 = 881.09/x
3. Step 3: Cross multiply
   1,627.11x = 2,245.43 × 881.09
4. Step 4: Simplify right side
   1,627.11x = 1,978,410.29
5. Step 5: Solve for x
   x = 1,978,410.29/1,627.11
6. Step 6: Final answer
   x = 1,215.90