Finding the Fourth Proportional to 1,667.10, 2,302.79 and 1,278.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.10 : 2,302.79 = 1,278.92 : x
2. Step 2: Convert to fraction form
   1,667.10/2,302.79 = 1,278.92/x
3. Step 3: Cross multiply
   1,667.10x = 2,302.79 × 1,278.92
4. Step 4: Simplify right side
   1,667.10x = 2,945,075.87
5. Step 5: Solve for x
   x = 2,945,075.87/1,667.10
6. Step 6: Final answer
   x = 1,766.59