Finding the Fourth Proportional to 1,319.37, 1,820.72 and 729.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,319.37 : 1,820.72 = 729.91 : x
2. Step 2: Convert to fraction form
   1,319.37/1,820.72 = 729.91/x
3. Step 3: Cross multiply
   1,319.37x = 1,820.72 × 729.91
4. Step 4: Simplify right side
   1,319.37x = 1,328,952.63
5. Step 5: Solve for x
   x = 1,328,952.63/1,319.37
6. Step 6: Final answer
   x = 1,007.26