Finding the Fourth Proportional to 1,319.33, 1,820.69 and 729.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319.33 : 1,820.69 = 729.89 : x
2. Step 2: Convert to fraction form
   1,319.33/1,820.69 = 729.89/x
3. Step 3: Cross multiply
   1,319.33x = 1,820.69 × 729.89
4. Step 4: Simplify right side
   1,319.33x = 1,328,890.67
5. Step 5: Solve for x
   x = 1,328,890.67/1,319.33
6. Step 6: Final answer
   x = 1,007.25