Finding the Fourth Proportional to 1,435.59, 1,981.11 and 838.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.59 : 1,981.11 = 838.20 : x
2. Step 2: Convert to fraction form
   1,435.59/1,981.11 = 838.20/x
3. Step 3: Cross multiply
   1,435.59x = 1,981.11 × 838.20
4. Step 4: Simplify right side
   1,435.59x = 1,660,566.40
5. Step 5: Solve for x
   x = 1,660,566.40/1,435.59
6. Step 6: Final answer
   x = 1,156.71