Finding the Fourth Proportional to 2,075.76, 2,859.30 and 1,939.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.76 : 2,859.30 = 1,939.68 : x
2. Step 2: Convert to fraction form
   2,075.76/2,859.30 = 1,939.68/x
3. Step 3: Cross multiply
   2,075.76x = 2,859.30 × 1,939.68
4. Step 4: Simplify right side
   2,075.76x = 5,546,127.02
5. Step 5: Solve for x
   x = 5,546,127.02/2,075.76
6. Step 6: Final answer
   x = 2,671.85