Finding the Fourth Proportional to 2,075.79, 2,864.38 and 1,279.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.79 : 2,864.38 = 1,279.00 : x
2. Step 2: Convert to fraction form
   2,075.79/2,864.38 = 1,279.00/x
3. Step 3: Cross multiply
   2,075.79x = 2,864.38 × 1,279.00
4. Step 4: Simplify right side
   2,075.79x = 3,663,528.69
5. Step 5: Solve for x
   x = 3,663,528.69/2,075.79
6. Step 6: Final answer
   x = 1,764.88