Finding the Fourth Proportional to 1,147.92, 1,720.83 and 417.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.92 : 1,720.83 = 417.34 : x
2. Step 2: Convert to fraction form
   1,147.92/1,720.83 = 417.34/x
3. Step 3: Cross multiply
   1,147.92x = 1,720.83 × 417.34
4. Step 4: Simplify right side
   1,147.92x = 718,162.59
5. Step 5: Solve for x
   x = 718,162.59/1,147.92
6. Step 6: Final answer
   x = 625.62