Finding the Fourth Proportional to 105,896.45, 146,137.50 and 57,498.45

Step by Step Solution

1. Step 1: Write the proportion equation
   105,896.45 : 146,137.50 = 57,498.45 : x
2. Step 2: Convert to fraction form
   105,896.45/146,137.50 = 57,498.45/x
3. Step 3: Cross multiply
   105,896.45x = 146,137.50 × 57,498.45
4. Step 4: Simplify right side
   105,896.45x = 8,402,679,736.88
5. Step 5: Solve for x
   x = 8,402,679,736.88/105,896.45
6. Step 6: Final answer
   x = 79,348.08