Finding the Fourth Proportional to 89,424.64, 134,041.92 and 42,578.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,424.64 : 134,041.92 = 42,578.56 : x
2. Step 2: Convert to fraction form
   89,424.64/134,041.92 = 42,578.56/x
3. Step 3: Cross multiply
   89,424.64x = 134,041.92 × 42,578.56
4. Step 4: Simplify right side
   89,424.64x = 5,707,311,933.24
5. Step 5: Solve for x
   x = 5,707,311,933.24/89,424.64
6. Step 6: Final answer
   x = 63,822.59