Finding the Fourth Proportional to 1,111.98, 1,666.85 and 722.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.98 : 1,666.85 = 722.24 : x
2. Step 2: Convert to fraction form
   1,111.98/1,666.85 = 722.24/x
3. Step 3: Cross multiply
   1,111.98x = 1,666.85 × 722.24
4. Step 4: Simplify right side
   1,111.98x = 1,203,859.22
5. Step 5: Solve for x
   x = 1,203,859.22/1,111.98
6. Step 6: Final answer
   x = 1,082.63