Finding the Fourth Proportional to 105,854.80, 146,081.28 and 58,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,854.80 : 146,081.28 = 58,112.50 : x
2. Step 2: Convert to fraction form
   105,854.80/146,081.28 = 58,112.50/x
3. Step 3: Cross multiply
   105,854.80x = 146,081.28 × 58,112.50
4. Step 4: Simplify right side
   105,854.80x = 8,489,148,384
5. Step 5: Solve for x
   x = 8,489,148,384/105,854.80
6. Step 6: Final answer
   x = 80,196.16