Finding the Fourth Proportional to 1,422.04, 1,961.86 and 862.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.04 : 1,961.86 = 862.14 : x
2. Step 2: Convert to fraction form
   1,422.04/1,961.86 = 862.14/x
3. Step 3: Cross multiply
   1,422.04x = 1,961.86 × 862.14
4. Step 4: Simplify right side
   1,422.04x = 1,691,397.98
5. Step 5: Solve for x
   x = 1,691,397.98/1,422.04
6. Step 6: Final answer
   x = 1,189.42