Finding the Fourth Proportional to 105,632.72, 158,469.06 and 42,457.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,632.72 : 158,469.06 = 42,457.76 : x
2. Step 2: Convert to fraction form
   105,632.72/158,469.06 = 42,457.76/x
3. Step 3: Cross multiply
   105,632.72x = 158,469.06 × 42,457.76
4. Step 4: Simplify right side
   105,632.72x = 6,728,241,316.91
5. Step 5: Solve for x
   x = 6,728,241,316.91/105,632.72
6. Step 6: Final answer
   x = 63,694.67