Finding the Fourth Proportional to 1,385.27, 1,911.49 and 888.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.27 : 1,911.49 = 888.58 : x
2. Step 2: Convert to fraction form
   1,385.27/1,911.49 = 888.58/x
3. Step 3: Cross multiply
   1,385.27x = 1,911.49 × 888.58
4. Step 4: Simplify right side
   1,385.27x = 1,698,511.78
5. Step 5: Solve for x
   x = 1,698,511.78/1,385.27
6. Step 6: Final answer
   x = 1,226.12