Finding the Fourth Proportional to 105,880.50, 146,128.05 and 61,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,880.50 : 146,128.05 = 61,168.50 : x
2. Step 2: Convert to fraction form
   105,880.50/146,128.05 = 61,168.50/x
3. Step 3: Cross multiply
   105,880.50x = 146,128.05 × 61,168.50
4. Step 4: Simplify right side
   105,880.50x = 8,938,433,626.43
5. Step 5: Solve for x
   x = 8,938,433,626.43/105,880.50
6. Step 6: Final answer
   x = 84,420.02