Finding the Fourth Proportional to 1,404.17, 2,105.49 and 479.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.17 : 2,105.49 = 479.35 : x
2. Step 2: Convert to fraction form
   1,404.17/2,105.49 = 479.35/x
3. Step 3: Cross multiply
   1,404.17x = 2,105.49 × 479.35
4. Step 4: Simplify right side
   1,404.17x = 1,009,271.06
5. Step 5: Solve for x
   x = 1,009,271.06/1,404.17
6. Step 6: Final answer
   x = 718.77