Finding the Fourth Proportional to 59,148.72, 81,605.64 and 39,015.60

Step by Step Solution

1. Step 1: Write the proportion equation
   59,148.72 : 81,605.64 = 39,015.60 : x
2. Step 2: Convert to fraction form
   59,148.72/81,605.64 = 39,015.60/x
3. Step 3: Cross multiply
   59,148.72x = 81,605.64 × 39,015.60
4. Step 4: Simplify right side
   59,148.72x = 3,183,893,007.98
5. Step 5: Solve for x
   x = 3,183,893,007.98/59,148.72
6. Step 6: Final answer
   x = 53,828.60