Finding the Fourth Proportional to 30,964.96, 42,815.52 and 30,464.64

Step by Step Solution

1. Step 1: Write the proportion equation
   30,964.96 : 42,815.52 = 30,464.64 : x
2. Step 2: Convert to fraction form
   30,964.96/42,815.52 = 30,464.64/x
3. Step 3: Cross multiply
   30,964.96x = 42,815.52 × 30,464.64
4. Step 4: Simplify right side
   30,964.96x = 1,304,359,403.21
5. Step 5: Solve for x
   x = 1,304,359,403.21/30,964.96
6. Step 6: Final answer
   x = 42,123.72