Finding the Fourth Proportional to 1,395.23, 1,924.43 and 922.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.23 : 1,924.43 = 922.86 : x
2. Step 2: Convert to fraction form
   1,395.23/1,924.43 = 922.86/x
3. Step 3: Cross multiply
   1,395.23x = 1,924.43 × 922.86
4. Step 4: Simplify right side
   1,395.23x = 1,775,974.86
5. Step 5: Solve for x
   x = 1,775,974.86/1,395.23
6. Step 6: Final answer
   x = 1,272.89