Finding the Fourth Proportional to 1,433.66, 1,978.54 and 836.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.66 : 1,978.54 = 836.37 : x
2. Step 2: Convert to fraction form
   1,433.66/1,978.54 = 836.37/x
3. Step 3: Cross multiply
   1,433.66x = 1,978.54 × 836.37
4. Step 4: Simplify right side
   1,433.66x = 1,654,789.41
5. Step 5: Solve for x
   x = 1,654,789.41/1,433.66
6. Step 6: Final answer
   x = 1,154.25