Finding the Fourth Proportional to 1,420.25, 1,958.69 and 922.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.25 : 1,958.69 = 922.42 : x
2. Step 2: Convert to fraction form
   1,420.25/1,958.69 = 922.42/x
3. Step 3: Cross multiply
   1,420.25x = 1,958.69 × 922.42
4. Step 4: Simplify right side
   1,420.25x = 1,806,720.42
5. Step 5: Solve for x
   x = 1,806,720.42/1,420.25
6. Step 6: Final answer
   x = 1,272.11