Finding the Fourth Proportional to 1,479.20, 2,217.62 and 738.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.20 : 2,217.62 = 738.43 : x
2. Step 2: Convert to fraction form
   1,479.20/2,217.62 = 738.43/x
3. Step 3: Cross multiply
   1,479.20x = 2,217.62 × 738.43
4. Step 4: Simplify right side
   1,479.20x = 1,637,547.89
5. Step 5: Solve for x
   x = 1,637,547.89/1,479.20
6. Step 6: Final answer
   x = 1,107.05