Finding the Fourth Proportional to 105,908.00, 146,152.50 and 57,509.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,908.00 : 146,152.50 = 57,509.50 : x
2. Step 2: Convert to fraction form
   105,908.00/146,152.50 = 57,509.50/x
3. Step 3: Cross multiply
   105,908.00x = 146,152.50 × 57,509.50
4. Step 4: Simplify right side
   105,908.00x = 8,405,157,616.47
5. Step 5: Solve for x
   x = 8,405,157,616.47/105,908.00
6. Step 6: Final answer
   x = 79,362.82