Finding the Fourth Proportional to 1,300.76, 1,950.64 and 422.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.76 : 1,950.64 = 422.96 : x
2. Step 2: Convert to fraction form
   1,300.76/1,950.64 = 422.96/x
3. Step 3: Cross multiply
   1,300.76x = 1,950.64 × 422.96
4. Step 4: Simplify right side
   1,300.76x = 825,042.69
5. Step 5: Solve for x
   x = 825,042.69/1,300.76
6. Step 6: Final answer
   x = 634.28