Finding the Fourth Proportional to 2,355.08, 3,533.76 and 1,123.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355.08 : 3,533.76 = 1,123.61 : x
2. Step 2: Convert to fraction form
   2,355.08/3,533.76 = 1,123.61/x
3. Step 3: Cross multiply
   2,355.08x = 3,533.76 × 1,123.61
4. Step 4: Simplify right side
   2,355.08x = 3,970,550.40
5. Step 5: Solve for x
   x = 3,970,550.40/2,355.08
6. Step 6: Final answer
   x = 1,685.95