Finding the Fourth Proportional to 2,079.93, 3,118.86 and 692.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.93 : 3,118.86 = 692.78 : x
2. Step 2: Convert to fraction form
   2,079.93/3,118.86 = 692.78/x
3. Step 3: Cross multiply
   2,079.93x = 3,118.86 × 692.78
4. Step 4: Simplify right side
   2,079.93x = 2,160,683.83
5. Step 5: Solve for x
   x = 2,160,683.83/2,079.93
6. Step 6: Final answer
   x = 1,038.83