Finding the Fourth Proportional to 105,461.82, 145,537.47 and 57,715.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,461.82 : 145,537.47 = 57,715.56 : x
2. Step 2: Convert to fraction form
   105,461.82/145,537.47 = 57,715.56/x
3. Step 3: Cross multiply
   105,461.82x = 145,537.47 × 57,715.56
4. Step 4: Simplify right side
   105,461.82x = 8,399,776,582.03
5. Step 5: Solve for x
   x = 8,399,776,582.03/105,461.82
6. Step 6: Final answer
   x = 79,647.56