Finding the Fourth Proportional to 105,556.82, 145,665.15 and 57,808.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,556.82 : 145,665.15 = 57,808.94 : x
2. Step 2: Convert to fraction form
   105,556.82/145,665.15 = 57,808.94/x
3. Step 3: Cross multiply
   105,556.82x = 145,665.15 × 57,808.94
4. Step 4: Simplify right side
   105,556.82x = 8,420,747,916.44
5. Step 5: Solve for x
   x = 8,420,747,916.44/105,556.82
6. Step 6: Final answer
   x = 79,774.55