Finding the Fourth Proportional to 1,379.84, 2,069.15 and 730.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.84 : 2,069.15 = 730.42 : x
2. Step 2: Convert to fraction form
   1,379.84/2,069.15 = 730.42/x
3. Step 3: Cross multiply
   1,379.84x = 2,069.15 × 730.42
4. Step 4: Simplify right side
   1,379.84x = 1,511,339.72
5. Step 5: Solve for x
   x = 1,511,339.72/1,379.84
6. Step 6: Final answer
   x = 1,095.30