Finding the Fourth Proportional to 1,300.92, 1,951.78 and 423.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.92 : 1,951.78 = 423.50 : x
2. Step 2: Convert to fraction form
   1,300.92/1,951.78 = 423.50/x
3. Step 3: Cross multiply
   1,300.92x = 1,951.78 × 423.50
4. Step 4: Simplify right side
   1,300.92x = 826,587.06
5. Step 5: Solve for x
   x = 826,587.06/1,300.92
6. Step 6: Final answer
   x = 635.38