Finding the Fourth Proportional to 2,923.76, 4,384.98 and 843.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,923.76 : 4,384.98 = 843.76 : x
2. Step 2: Convert to fraction form
   2,923.76/4,384.98 = 843.76/x
3. Step 3: Cross multiply
   2,923.76x = 4,384.98 × 843.76
4. Step 4: Simplify right side
   2,923.76x = 3,699,870.72
5. Step 5: Solve for x
   x = 3,699,870.72/2,923.76
6. Step 6: Final answer
   x = 1,265.45