Finding the Fourth Proportional to 105,961.50, 146,239.83 and 61,249.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,961.50 : 146,239.83 = 61,249.50 : x
2. Step 2: Convert to fraction form
   105,961.50/146,239.83 = 61,249.50/x
3. Step 3: Cross multiply
   105,961.50x = 146,239.83 × 61,249.50
4. Step 4: Simplify right side
   105,961.50x = 8,957,116,467.59
5. Step 5: Solve for x
   x = 8,957,116,467.59/105,961.50
6. Step 6: Final answer
   x = 84,531.80