Finding the Fourth Proportional to 1,385.04, 1,911.69 and 854.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.04 : 1,911.69 = 854.69 : x
2. Step 2: Convert to fraction form
   1,385.04/1,911.69 = 854.69/x
3. Step 3: Cross multiply
   1,385.04x = 1,911.69 × 854.69
4. Step 4: Simplify right side
   1,385.04x = 1,633,907.11
5. Step 5: Solve for x
   x = 1,633,907.11/1,385.04
6. Step 6: Final answer
   x = 1,179.68