Finding the Fourth Proportional to 42,867.05, 64,399.12 and 30,245.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,867.05 : 64,399.12 = 30,245.85 : x
2. Step 2: Convert to fraction form
   42,867.05/64,399.12 = 30,245.85/x
3. Step 3: Cross multiply
   42,867.05x = 64,399.12 × 30,245.85
4. Step 4: Simplify right side
   42,867.05x = 1,947,806,048.04
5. Step 5: Solve for x
   x = 1,947,806,048.04/42,867.05
6. Step 6: Final answer
   x = 45,438.31