Finding the Fourth Proportional to 1,300.71, 1,950.86 and 423.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.71 : 1,950.86 = 423.24 : x
2. Step 2: Convert to fraction form
   1,300.71/1,950.86 = 423.24/x
3. Step 3: Cross multiply
   1,300.71x = 1,950.86 × 423.24
4. Step 4: Simplify right side
   1,300.71x = 825,675.73
5. Step 5: Solve for x
   x = 825,675.73/1,300.71
6. Step 6: Final answer
   x = 634.79