Finding the Fourth Proportional to 105,819.92, 146,026.89 and 58,074.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,819.92 : 146,026.89 = 58,074.06 : x
2. Step 2: Convert to fraction form
   105,819.92/146,026.89 = 58,074.06/x
3. Step 3: Cross multiply
   105,819.92x = 146,026.89 × 58,074.06
4. Step 4: Simplify right side
   105,819.92x = 8,480,374,371.47
5. Step 5: Solve for x
   x = 8,480,374,371.47/105,819.92
6. Step 6: Final answer
   x = 80,139.68