Finding the Fourth Proportional to 105,979.57, 146,251.78 and 58,236.00

Step by Step Solution

1. Step 1: Write the proportion equation
   105,979.57 : 146,251.78 = 58,236.00 : x
2. Step 2: Convert to fraction form
   105,979.57/146,251.78 = 58,236.00/x
3. Step 3: Cross multiply
   105,979.57x = 146,251.78 × 58,236.00
4. Step 4: Simplify right side
   105,979.57x = 8,517,117,966.05
5. Step 5: Solve for x
   x = 8,517,117,966.05/105,979.57
6. Step 6: Final answer
   x = 80,365.66