Finding the Fourth Proportional to 1,404.40, 2,105.40 and 992.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.40 : 2,105.40 = 992.24 : x
2. Step 2: Convert to fraction form
   1,404.40/2,105.40 = 992.24/x
3. Step 3: Cross multiply
   1,404.40x = 2,105.40 × 992.24
4. Step 4: Simplify right side
   1,404.40x = 2,089,062.10
5. Step 5: Solve for x
   x = 2,089,062.10/1,404.40
6. Step 6: Final answer
   x = 1,487.51