Finding the Fourth Proportional to 1,338.27, 1,846.59 and 840.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.27 : 1,846.59 = 840.55 : x
2. Step 2: Convert to fraction form
   1,338.27/1,846.59 = 840.55/x
3. Step 3: Cross multiply
   1,338.27x = 1,846.59 × 840.55
4. Step 4: Simplify right side
   1,338.27x = 1,552,154.48
5. Step 5: Solve for x
   x = 1,552,154.48/1,338.27
6. Step 6: Final answer
   x = 1,159.82