Finding the Fourth Proportional to 1,333.49, 1,840.18 and 836.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.49 : 1,840.18 = 836.40 : x
2. Step 2: Convert to fraction form
   1,333.49/1,840.18 = 836.40/x
3. Step 3: Cross multiply
   1,333.49x = 1,840.18 × 836.40
4. Step 4: Simplify right side
   1,333.49x = 1,539,126.55
5. Step 5: Solve for x
   x = 1,539,126.55/1,333.49
6. Step 6: Final answer
   x = 1,154.21