Finding the Fourth Proportional to 1,433.62, 1,978.51 and 836.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.62 : 1,978.51 = 836.30 : x
2. Step 2: Convert to fraction form
   1,433.62/1,978.51 = 836.30/x
3. Step 3: Cross multiply
   1,433.62x = 1,978.51 × 836.30
4. Step 4: Simplify right side
   1,433.62x = 1,654,615.93
5. Step 5: Solve for x
   x = 1,654,615.93/1,433.62
6. Step 6: Final answer
   x = 1,154.15