Finding the Fourth Proportional to 1,335.60, 1,842.72 and 838.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.60 : 1,842.72 = 838.08 : x
2. Step 2: Convert to fraction form
   1,335.60/1,842.72 = 838.08/x
3. Step 3: Cross multiply
   1,335.60x = 1,842.72 × 838.08
4. Step 4: Simplify right side
   1,335.60x = 1,544,346.78
5. Step 5: Solve for x
   x = 1,544,346.78/1,335.60
6. Step 6: Final answer
   x = 1,156.29