Finding the Fourth Proportional to 1,422.04, 1,962.78 and 862.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.04 : 1,962.78 = 862.52 : x
2. Step 2: Convert to fraction form
   1,422.04/1,962.78 = 862.52/x
3. Step 3: Cross multiply
   1,422.04x = 1,962.78 × 862.52
4. Step 4: Simplify right side
   1,422.04x = 1,692,937.01
5. Step 5: Solve for x
   x = 1,692,937.01/1,422.04
6. Step 6: Final answer
   x = 1,190.50