Finding the Fourth Proportional to 1,372.89, 1,894.35 and 841.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.89 : 1,894.35 = 841.50 : x
2. Step 2: Convert to fraction form
   1,372.89/1,894.35 = 841.50/x
3. Step 3: Cross multiply
   1,372.89x = 1,894.35 × 841.50
4. Step 4: Simplify right side
   1,372.89x = 1,594,095.53
5. Step 5: Solve for x
   x = 1,594,095.53/1,372.89
6. Step 6: Final answer
   x = 1,161.12