Finding the Fourth Proportional to 1,404.02, 2,107.47 and 920.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.02 : 2,107.47 = 920.54 : x
2. Step 2: Convert to fraction form
   1,404.02/2,107.47 = 920.54/x
3. Step 3: Cross multiply
   1,404.02x = 2,107.47 × 920.54
4. Step 4: Simplify right side
   1,404.02x = 1,940,010.43
5. Step 5: Solve for x
   x = 1,940,010.43/1,404.02
6. Step 6: Final answer
   x = 1,381.75