Finding the Fourth Proportional to 105,410.58, 145,466.42 and 57,663.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,410.58 : 145,466.42 = 57,663.96 : x
2. Step 2: Convert to fraction form
   105,410.58/145,466.42 = 57,663.96/x
3. Step 3: Cross multiply
   105,410.58x = 145,466.42 × 57,663.96
4. Step 4: Simplify right side
   105,410.58x = 8,388,169,535.90
5. Step 5: Solve for x
   x = 8,388,169,535.90/105,410.58
6. Step 6: Final answer
   x = 79,576.16