Finding the Fourth Proportional to 1,422.90, 1,964.58 and 892.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.90 : 1,964.58 = 892.02 : x
2. Step 2: Convert to fraction form
   1,422.90/1,964.58 = 892.02/x
3. Step 3: Cross multiply
   1,422.90x = 1,964.58 × 892.02
4. Step 4: Simplify right side
   1,422.90x = 1,752,444.65
5. Step 5: Solve for x
   x = 1,752,444.65/1,422.90
6. Step 6: Final answer
   x = 1,231.60