Finding the Fourth Proportional to 1,479.72, 2,041.99 and 816.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.72 : 2,041.99 = 816.57 : x
2. Step 2: Convert to fraction form
   1,479.72/2,041.99 = 816.57/x
3. Step 3: Cross multiply
   1,479.72x = 2,041.99 × 816.57
4. Step 4: Simplify right side
   1,479.72x = 1,667,425.73
5. Step 5: Solve for x
   x = 1,667,425.73/1,479.72
6. Step 6: Final answer
   x = 1,126.85