Finding the Fourth Proportional to 1,162.48, 1,746.12 and 1,123.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.48 : 1,746.12 = 1,123.60 : x
2. Step 2: Convert to fraction form
   1,162.48/1,746.12 = 1,123.60/x
3. Step 3: Cross multiply
   1,162.48x = 1,746.12 × 1,123.60
4. Step 4: Simplify right side
   1,162.48x = 1,961,940.43
5. Step 5: Solve for x
   x = 1,961,940.43/1,162.48
6. Step 6: Final answer
   x = 1,687.72