Finding the Fourth Proportional to 1,830.72, 2,743.52 and 854.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,830.72 : 2,743.52 = 854.40 : x
2. Step 2: Convert to fraction form
   1,830.72/2,743.52 = 854.40/x
3. Step 3: Cross multiply
   1,830.72x = 2,743.52 × 854.40
4. Step 4: Simplify right side
   1,830.72x = 2,344,063.49
5. Step 5: Solve for x
   x = 2,344,063.49/1,830.72
6. Step 6: Final answer
   x = 1,280.41