Finding the Fourth Proportional to 105.31, 158.10 and 47.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105.31 : 158.10 = 47.62 : x
2. Step 2: Convert to fraction form
   105.31/158.10 = 47.62/x
3. Step 3: Cross multiply
   105.31x = 158.10 × 47.62
4. Step 4: Simplify right side
   105.31x = 7,528.72
5. Step 5: Solve for x
   x = 7,528.72/105.31
6. Step 6: Final answer
   x = 71.49