Finding the Fourth Proportional to 1,337.41, 1,846.78 and 840.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.41 : 1,846.78 = 840.90 : x
2. Step 2: Convert to fraction form
   1,337.41/1,846.78 = 840.90/x
3. Step 3: Cross multiply
   1,337.41x = 1,846.78 × 840.90
4. Step 4: Simplify right side
   1,337.41x = 1,552,957.30
5. Step 5: Solve for x
   x = 1,552,957.30/1,337.41
6. Step 6: Final answer
   x = 1,161.17