Finding the Fourth Proportional to 105,804.16, 146,009.33 and 58,058.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,804.16 : 146,009.33 = 58,058.30 : x
2. Step 2: Convert to fraction form
   105,804.16/146,009.33 = 58,058.30/x
3. Step 3: Cross multiply
   105,804.16x = 146,009.33 × 58,058.30
4. Step 4: Simplify right side
   105,804.16x = 8,477,053,558.67
5. Step 5: Solve for x
   x = 8,477,053,558.67/105,804.16
6. Step 6: Final answer
   x = 80,120.23