Finding the Fourth Proportional to 1,337.83, 1,846.59 and 840.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.83 : 1,846.59 = 840.64 : x
2. Step 2: Convert to fraction form
   1,337.83/1,846.59 = 840.64/x
3. Step 3: Cross multiply
   1,337.83x = 1,846.59 × 840.64
4. Step 4: Simplify right side
   1,337.83x = 1,552,317.42
5. Step 5: Solve for x
   x = 1,552,317.42/1,337.83
6. Step 6: Final answer
   x = 1,160.32