Finding the Fourth Proportional to 1,479.20, 2,041.38 and 816.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.20 : 2,041.38 = 816.05 : x
2. Step 2: Convert to fraction form
   1,479.20/2,041.38 = 816.05/x
3. Step 3: Cross multiply
   1,479.20x = 2,041.38 × 816.05
4. Step 4: Simplify right side
   1,479.20x = 1,665,868.15
5. Step 5: Solve for x
   x = 1,665,868.15/1,479.20
6. Step 6: Final answer
   x = 1,126.20