Finding the Fourth Proportional to 1,424.30, 1,965.90 and 1,276.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.30 : 1,965.90 = 1,276.67 : x
2. Step 2: Convert to fraction form
   1,424.30/1,965.90 = 1,276.67/x
3. Step 3: Cross multiply
   1,424.30x = 1,965.90 × 1,276.67
4. Step 4: Simplify right side
   1,424.30x = 2,509,795.72
5. Step 5: Solve for x
   x = 2,509,795.72/1,424.30
6. Step 6: Final answer
   x = 1,762.13