Finding the Fourth Proportional to 1,333.53, 1,838.29 and 861.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.53 : 1,838.29 = 861.39 : x
2. Step 2: Convert to fraction form
   1,333.53/1,838.29 = 861.39/x
3. Step 3: Cross multiply
   1,333.53x = 1,838.29 × 861.39
4. Step 4: Simplify right side
   1,333.53x = 1,583,484.62
5. Step 5: Solve for x
   x = 1,583,484.62/1,333.53
6. Step 6: Final answer
   x = 1,187.44