Finding the Fourth Proportional to 1,300.83, 1,951.03 and 423.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.83 : 1,951.03 = 423.21 : x
2. Step 2: Convert to fraction form
   1,300.83/1,951.03 = 423.21/x
3. Step 3: Cross multiply
   1,300.83x = 1,951.03 × 423.21
4. Step 4: Simplify right side
   1,300.83x = 825,691.09
5. Step 5: Solve for x
   x = 825,691.09/1,300.83
6. Step 6: Final answer
   x = 634.74