Finding the Fourth Proportional to 105,885, 146,121.30 and 61,173

Step by Step Solution

1. Step 1: Write the proportion equation
   105,885 : 146,121.30 = 61,173 : x
2. Step 2: Convert to fraction form
   105,885/146,121.30 = 61,173/x
3. Step 3: Cross multiply
   105,885x = 146,121.30 × 61,173
4. Step 4: Simplify right side
   105,885x = 8,938,678,284.90
5. Step 5: Solve for x
   x = 8,938,678,284.90/105,885
6. Step 6: Final answer
   x = 84,418.74