Finding the Fourth Proportional to 1,333.42, 1,838.46 and 860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.42 : 1,838.46 = 860.50 : x
2. Step 2: Convert to fraction form
   1,333.42/1,838.46 = 860.50/x
3. Step 3: Cross multiply
   1,333.42x = 1,838.46 × 860.50
4. Step 4: Simplify right side
   1,333.42x = 1,581,994.83
5. Step 5: Solve for x
   x = 1,581,994.83/1,333.42
6. Step 6: Final answer
   x = 1,186.42