Finding the Fourth Proportional to 105,853.05, 146,287.17 and 86,702.49

Step by Step Solution

1. Step 1: Write the proportion equation
   105,853.05 : 146,287.17 = 86,702.49 : x
2. Step 2: Convert to fraction form
   105,853.05/146,287.17 = 86,702.49/x
3. Step 3: Cross multiply
   105,853.05x = 146,287.17 × 86,702.49
4. Step 4: Simplify right side
   105,853.05x = 12,683,461,894.05
5. Step 5: Solve for x
   x = 12,683,461,894.05/105,853.05
6. Step 6: Final answer
   x = 119,821.41