Finding the Fourth Proportional to 105,900.36, 146,144.04 and 58,158

Step by Step Solution

1. Step 1: Write the proportion equation
   105,900.36 : 146,144.04 = 58,158 : x
2. Step 2: Convert to fraction form
   105,900.36/146,144.04 = 58,158/x
3. Step 3: Cross multiply
   105,900.36x = 146,144.04 × 58,158
4. Step 4: Simplify right side
   105,900.36x = 8,499,445,078.32
5. Step 5: Solve for x
   x = 8,499,445,078.32/105,900.36
6. Step 6: Final answer
   x = 80,258.89