Finding the Fourth Proportional to 1,021.59, 1,407.82 and 726.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021.59 : 1,407.82 = 726.35 : x
2. Step 2: Convert to fraction form
   1,021.59/1,407.82 = 726.35/x
3. Step 3: Cross multiply
   1,021.59x = 1,407.82 × 726.35
4. Step 4: Simplify right side
   1,021.59x = 1,022,570.06
5. Step 5: Solve for x
   x = 1,022,570.06/1,021.59
6. Step 6: Final answer
   x = 1,000.96