Finding the Fourth Proportional to 1,093.37, 1,640.34 and 400.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.37 : 1,640.34 = 400.10 : x
2. Step 2: Convert to fraction form
   1,093.37/1,640.34 = 400.10/x
3. Step 3: Cross multiply
   1,093.37x = 1,640.34 × 400.10
4. Step 4: Simplify right side
   1,093.37x = 656,300.03
5. Step 5: Solve for x
   x = 656,300.03/1,093.37
6. Step 6: Final answer
   x = 600.25