Finding the Fourth Proportional to 2,075.60, 3,111.01 and 841.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.60 : 3,111.01 = 841.65 : x
2. Step 2: Convert to fraction form
   2,075.60/3,111.01 = 841.65/x
3. Step 3: Cross multiply
   2,075.60x = 3,111.01 × 841.65
4. Step 4: Simplify right side
   2,075.60x = 2,618,389.67
5. Step 5: Solve for x
   x = 2,618,389.67/2,075.60
6. Step 6: Final answer
   x = 1,261.51