Finding the Fourth Proportional to 42,777.12, 64,021.12 and 30,544.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,777.12 : 64,021.12 = 30,544.48 : x
2. Step 2: Convert to fraction form
   42,777.12/64,021.12 = 30,544.48/x
3. Step 3: Cross multiply
   42,777.12x = 64,021.12 × 30,544.48
4. Step 4: Simplify right side
   42,777.12x = 1,955,491,819.42
5. Step 5: Solve for x
   x = 1,955,491,819.42/42,777.12
6. Step 6: Final answer
   x = 45,713.50