Finding the Fourth Proportional to 1,205.31, 1,662.22 and 925.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205.31 : 1,662.22 = 925.56 : x
2. Step 2: Convert to fraction form
   1,205.31/1,662.22 = 925.56/x
3. Step 3: Cross multiply
   1,205.31x = 1,662.22 × 925.56
4. Step 4: Simplify right side
   1,205.31x = 1,538,485.50
5. Step 5: Solve for x
   x = 1,538,485.50/1,205.31
6. Step 6: Final answer
   x = 1,276.42