Finding the Fourth Proportional to 1,435.92, 1,981.77 and 838.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.92 : 1,981.77 = 838.61 : x
2. Step 2: Convert to fraction form
   1,435.92/1,981.77 = 838.61/x
3. Step 3: Cross multiply
   1,435.92x = 1,981.77 × 838.61
4. Step 4: Simplify right side
   1,435.92x = 1,661,932.14
5. Step 5: Solve for x
   x = 1,661,932.14/1,435.92
6. Step 6: Final answer
   x = 1,157.40