Finding the Fourth Proportional to 42,768.56, 64,162.56 and 19,401.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,768.56 : 64,162.56 = 19,401.68 : x
2. Step 2: Convert to fraction form
   42,768.56/64,162.56 = 19,401.68/x
3. Step 3: Cross multiply
   42,768.56x = 64,162.56 × 19,401.68
4. Step 4: Simplify right side
   42,768.56x = 1,244,861,457.10
5. Step 5: Solve for x
   x = 1,244,861,457.10/42,768.56
6. Step 6: Final answer
   x = 29,106.93