Finding the Fourth Proportional to 1,123.40, 1,552.21 and 1,083.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.40 : 1,552.21 = 1,083.98 : x
2. Step 2: Convert to fraction form
   1,123.40/1,552.21 = 1,083.98/x
3. Step 3: Cross multiply
   1,123.40x = 1,552.21 × 1,083.98
4. Step 4: Simplify right side
   1,123.40x = 1,682,564.60
5. Step 5: Solve for x
   x = 1,682,564.60/1,123.40
6. Step 6: Final answer
   x = 1,497.74