Finding the Fourth Proportional to 1,337.74, 1,845.58 and 840.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.74 : 1,845.58 = 840.18 : x
2. Step 2: Convert to fraction form
   1,337.74/1,845.58 = 840.18/x
3. Step 3: Cross multiply
   1,337.74x = 1,845.58 × 840.18
4. Step 4: Simplify right side
   1,337.74x = 1,550,619.40
5. Step 5: Solve for x
   x = 1,550,619.40/1,337.74
6. Step 6: Final answer
   x = 1,159.13