Finding the Fourth Proportional to 1,337.79, 1,845.86 and 840.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.79 : 1,845.86 = 840.25 : x
2. Step 2: Convert to fraction form
   1,337.79/1,845.86 = 840.25/x
3. Step 3: Cross multiply
   1,337.79x = 1,845.86 × 840.25
4. Step 4: Simplify right side
   1,337.79x = 1,550,984.33
5. Step 5: Solve for x
   x = 1,550,984.33/1,337.79
6. Step 6: Final answer
   x = 1,159.36