Finding the Fourth Proportional to 105,405.34, 145,442.38 and 60,083.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,405.34 : 145,442.38 = 60,083.42 : x
2. Step 2: Convert to fraction form
   105,405.34/145,442.38 = 60,083.42/x
3. Step 3: Cross multiply
   105,405.34x = 145,442.38 × 60,083.42
4. Step 4: Simplify right side
   105,405.34x = 8,738,675,603.34
5. Step 5: Solve for x
   x = 8,738,675,603.34/105,405.34
6. Step 6: Final answer
   x = 82,905.44