Finding the Fourth Proportional to 105,918.69, 146,167.69 and 58,175.11

Step by Step Solution

1. Step 1: Write the proportion equation
   105,918.69 : 146,167.69 = 58,175.11 : x
2. Step 2: Convert to fraction form
   105,918.69/146,167.69 = 58,175.11/x
3. Step 3: Cross multiply
   105,918.69x = 146,167.69 × 58,175.11
4. Step 4: Simplify right side
   105,918.69x = 8,503,321,590.55
5. Step 5: Solve for x
   x = 8,503,321,590.55/105,918.69
6. Step 6: Final answer
   x = 80,281.60