Finding the Fourth Proportional to 1,372.58, 1,893.34 and 841.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.58 : 1,893.34 = 841.55 : x
2. Step 2: Convert to fraction form
   1,372.58/1,893.34 = 841.55/x
3. Step 3: Cross multiply
   1,372.58x = 1,893.34 × 841.55
4. Step 4: Simplify right side
   1,372.58x = 1,593,340.28
5. Step 5: Solve for x
   x = 1,593,340.28/1,372.58
6. Step 6: Final answer
   x = 1,160.84