Finding the Fourth Proportional to 1,422.33, 1,961.04 and 1,186.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.33 : 1,961.04 = 1,186.62 : x
2. Step 2: Convert to fraction form
   1,422.33/1,961.04 = 1,186.62/x
3. Step 3: Cross multiply
   1,422.33x = 1,961.04 × 1,186.62
4. Step 4: Simplify right side
   1,422.33x = 2,327,009.28
5. Step 5: Solve for x
   x = 2,327,009.28/1,422.33
6. Step 6: Final answer
   x = 1,636.05