Finding the Fourth Proportional to 1,113.77, 1,537.33 and 720.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.77 : 1,537.33 = 720.82 : x
2. Step 2: Convert to fraction form
   1,113.77/1,537.33 = 720.82/x
3. Step 3: Cross multiply
   1,113.77x = 1,537.33 × 720.82
4. Step 4: Simplify right side
   1,113.77x = 1,108,136.17
5. Step 5: Solve for x
   x = 1,108,136.17/1,113.77
6. Step 6: Final answer
   x = 994.94