Finding the Fourth Proportional to 1,308.86, 1,804.41 and 888.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.86 : 1,804.41 = 888.56 : x
2. Step 2: Convert to fraction form
   1,308.86/1,804.41 = 888.56/x
3. Step 3: Cross multiply
   1,308.86x = 1,804.41 × 888.56
4. Step 4: Simplify right side
   1,308.86x = 1,603,326.55
5. Step 5: Solve for x
   x = 1,603,326.55/1,308.86
6. Step 6: Final answer
   x = 1,224.98