Finding the Fourth Proportional to 2,075.40, 3,113.94 and 842.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.40 : 3,113.94 = 842.49 : x
2. Step 2: Convert to fraction form
   2,075.40/3,113.94 = 842.49/x
3. Step 3: Cross multiply
   2,075.40x = 3,113.94 × 842.49
4. Step 4: Simplify right side
   2,075.40x = 2,623,463.31
5. Step 5: Solve for x
   x = 2,623,463.31/2,075.40
6. Step 6: Final answer
   x = 1,264.08