Finding the Fourth Proportional to 1,405.18, 2,105.94 and 942.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.18 : 2,105.94 = 942.26 : x
2. Step 2: Convert to fraction form
   1,405.18/2,105.94 = 942.26/x
3. Step 3: Cross multiply
   1,405.18x = 2,105.94 × 942.26
4. Step 4: Simplify right side
   1,405.18x = 1,984,343.02
5. Step 5: Solve for x
   x = 1,984,343.02/1,405.18
6. Step 6: Final answer
   x = 1,412.17