Finding the Fourth Proportional to 105,908.64, 146,152.72 and 58,165.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,908.64 : 146,152.72 = 58,165.28 : x
2. Step 2: Convert to fraction form
   105,908.64/146,152.72 = 58,165.28/x
3. Step 3: Cross multiply
   105,908.64x = 146,152.72 × 58,165.28
4. Step 4: Simplify right side
   105,908.64x = 8,501,013,881.56
5. Step 5: Solve for x
   x = 8,501,013,881.56/105,908.64
6. Step 6: Final answer
   x = 80,267.43