Finding the Fourth Proportional to 1,335.89, 1,843.76 and 838.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.89 : 1,843.76 = 838.35 : x
2. Step 2: Convert to fraction form
   1,335.89/1,843.76 = 838.35/x
3. Step 3: Cross multiply
   1,335.89x = 1,843.76 × 838.35
4. Step 4: Simplify right side
   1,335.89x = 1,545,718.29
5. Step 5: Solve for x
   x = 1,545,718.29/1,335.89
6. Step 6: Final answer
   x = 1,157.07