Finding the Fourth Proportional to 2,812.77, 4,219.43 and 964.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,812.77 : 4,219.43 = 964.35 : x
2. Step 2: Convert to fraction form
   2,812.77/4,219.43 = 964.35/x
3. Step 3: Cross multiply
   2,812.77x = 4,219.43 × 964.35
4. Step 4: Simplify right side
   2,812.77x = 4,069,002.50
5. Step 5: Solve for x
   x = 4,069,002.50/2,812.77
6. Step 6: Final answer
   x = 1,446.62