Finding the Fourth Proportional to 2,075.31, 3,111.19 and 904.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.31 : 3,111.19 = 904.42 : x
2. Step 2: Convert to fraction form
   2,075.31/3,111.19 = 904.42/x
3. Step 3: Cross multiply
   2,075.31x = 3,111.19 × 904.42
4. Step 4: Simplify right side
   2,075.31x = 2,813,822.46
5. Step 5: Solve for x
   x = 2,813,822.46/2,075.31
6. Step 6: Final answer
   x = 1,355.86