Finding the Fourth Proportional to 1,041.80, 1,436.04 and 820.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.80 : 1,436.04 = 820.37 : x
2. Step 2: Convert to fraction form
   1,041.80/1,436.04 = 820.37/x
3. Step 3: Cross multiply
   1,041.80x = 1,436.04 × 820.37
4. Step 4: Simplify right side
   1,041.80x = 1,178,084.13
5. Step 5: Solve for x
   x = 1,178,084.13/1,041.80
6. Step 6: Final answer
   x = 1,130.82