Finding the Fourth Proportional to 105,630.72, 158,466.06 and 42,455.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,630.72 : 158,466.06 = 42,455.76 : x
2. Step 2: Convert to fraction form
   105,630.72/158,466.06 = 42,455.76/x
3. Step 3: Cross multiply
   105,630.72x = 158,466.06 × 42,455.76
4. Step 4: Simplify right side
   105,630.72x = 6,727,797,011.51
5. Step 5: Solve for x
   x = 6,727,797,011.51/105,630.72
6. Step 6: Final answer
   x = 63,691.67