Finding the Fourth Proportional to 105,987.90, 146,271.45 and 60,680.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,987.90 : 146,271.45 = 60,680.10 : x
2. Step 2: Convert to fraction form
   105,987.90/146,271.45 = 60,680.10/x
3. Step 3: Cross multiply
   105,987.90x = 146,271.45 × 60,680.10
4. Step 4: Simplify right side
   105,987.90x = 8,875,766,213.15
5. Step 5: Solve for x
   x = 8,875,766,213.15/105,987.90
6. Step 6: Final answer
   x = 83,743.20