Finding the Fourth Proportional to 1,288.59, 1,777.83 and 729.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.59 : 1,777.83 = 729.01 : x
2. Step 2: Convert to fraction form
   1,288.59/1,777.83 = 729.01/x
3. Step 3: Cross multiply
   1,288.59x = 1,777.83 × 729.01
4. Step 4: Simplify right side
   1,288.59x = 1,296,055.85
5. Step 5: Solve for x
   x = 1,296,055.85/1,288.59
6. Step 6: Final answer
   x = 1,005.79