Finding the Fourth Proportional to 1,479.17, 2,041.17 and 815.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.17 : 2,041.17 = 815.89 : x
2. Step 2: Convert to fraction form
   1,479.17/2,041.17 = 815.89/x
3. Step 3: Cross multiply
   1,479.17x = 2,041.17 × 815.89
4. Step 4: Simplify right side
   1,479.17x = 1,665,370.19
5. Step 5: Solve for x
   x = 1,665,370.19/1,479.17
6. Step 6: Final answer
   x = 1,125.89