Finding the Fourth Proportional to 1,411.59, 2,111.99 and 854.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.59 : 2,111.99 = 854.25 : x
2. Step 2: Convert to fraction form
   1,411.59/2,111.99 = 854.25/x
3. Step 3: Cross multiply
   1,411.59x = 2,111.99 × 854.25
4. Step 4: Simplify right side
   1,411.59x = 1,804,163.19
5. Step 5: Solve for x
   x = 1,804,163.19/1,411.59
6. Step 6: Final answer
   x = 1,278.11