Finding the Fourth Proportional to 1,055.34, 1,582.83 and 478.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.34 : 1,582.83 = 478.08 : x
2. Step 2: Convert to fraction form
   1,055.34/1,582.83 = 478.08/x
3. Step 3: Cross multiply
   1,055.34x = 1,582.83 × 478.08
4. Step 4: Simplify right side
   1,055.34x = 756,719.37
5. Step 5: Solve for x
   x = 756,719.37/1,055.34
6. Step 6: Final answer
   x = 717.04