Finding the Fourth Proportional to 1,404.57, 2,110.91 and 920.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.57 : 2,110.91 = 920.64 : x
2. Step 2: Convert to fraction form
   1,404.57/2,110.91 = 920.64/x
3. Step 3: Cross multiply
   1,404.57x = 2,110.91 × 920.64
4. Step 4: Simplify right side
   1,404.57x = 1,943,383.58
5. Step 5: Solve for x
   x = 1,943,383.58/1,404.57
6. Step 6: Final answer
   x = 1,383.61