Finding the Fourth Proportional to 1,870.75, 2,804.80 and 830.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.75 : 2,804.80 = 830.18 : x
2. Step 2: Convert to fraction form
   1,870.75/2,804.80 = 830.18/x
3. Step 3: Cross multiply
   1,870.75x = 2,804.80 × 830.18
4. Step 4: Simplify right side
   1,870.75x = 2,328,488.86
5. Step 5: Solve for x
   x = 2,328,488.86/1,870.75
6. Step 6: Final answer
   x = 1,244.68