Finding the Fourth Proportional to 2,075.76, 3,111.75 and 1,611

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.76 : 3,111.75 = 1,611 : x
2. Step 2: Convert to fraction form
   2,075.76/3,111.75 = 1,611/x
3. Step 3: Cross multiply
   2,075.76x = 3,111.75 × 1,611
4. Step 4: Simplify right side
   2,075.76x = 5,013,029.25
5. Step 5: Solve for x
   x = 5,013,029.25/2,075.76
6. Step 6: Final answer
   x = 2,415.03