Finding the Fourth Proportional to 105,631.72, 158,467.56 and 42,456.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,631.72 : 158,467.56 = 42,456.76 : x
2. Step 2: Convert to fraction form
   105,631.72/158,467.56 = 42,456.76/x
3. Step 3: Cross multiply
   105,631.72x = 158,467.56 × 42,456.76
4. Step 4: Simplify right side
   105,631.72x = 6,728,019,162.71
5. Step 5: Solve for x
   x = 6,728,019,162.71/105,631.72
6. Step 6: Final answer
   x = 63,693.17