Finding the Fourth Proportional to 1,422.12, 1,962.45 and 784.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.12 : 1,962.45 = 784.04 : x
2. Step 2: Convert to fraction form
   1,422.12/1,962.45 = 784.04/x
3. Step 3: Cross multiply
   1,422.12x = 1,962.45 × 784.04
4. Step 4: Simplify right side
   1,422.12x = 1,538,644.20
5. Step 5: Solve for x
   x = 1,538,644.20/1,422.12
6. Step 6: Final answer
   x = 1,081.93