Finding the Fourth Proportional to 42,936.24, 64,333.20 and 30,394.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,936.24 : 64,333.20 = 30,394.32 : x
2. Step 2: Convert to fraction form
   42,936.24/64,333.20 = 30,394.32/x
3. Step 3: Cross multiply
   42,936.24x = 64,333.20 × 30,394.32
4. Step 4: Simplify right side
   42,936.24x = 1,955,363,867.42
5. Step 5: Solve for x
   x = 1,955,363,867.42/42,936.24
6. Step 6: Final answer
   x = 45,541.11