Finding the Fourth Proportional to 1,627.18, 2,245.51 and 881.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.18 : 2,245.51 = 881.15 : x
2. Step 2: Convert to fraction form
   1,627.18/2,245.51 = 881.15/x
3. Step 3: Cross multiply
   1,627.18x = 2,245.51 × 881.15
4. Step 4: Simplify right side
   1,627.18x = 1,978,631.14
5. Step 5: Solve for x
   x = 1,978,631.14/1,627.18
6. Step 6: Final answer
   x = 1,215.99