Finding the Fourth Proportional to 1,354.89, 1,868.78 and 881.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.89 : 1,868.78 = 881.92 : x
2. Step 2: Convert to fraction form
   1,354.89/1,868.78 = 881.92/x
3. Step 3: Cross multiply
   1,354.89x = 1,868.78 × 881.92
4. Step 4: Simplify right side
   1,354.89x = 1,648,105.11
5. Step 5: Solve for x
   x = 1,648,105.11/1,354.89
6. Step 6: Final answer
   x = 1,216.41