Finding the Fourth Proportional to 105,890.81, 146,030.31 and 84,451.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,890.81 : 146,030.31 = 84,451.88 : x
2. Step 2: Convert to fraction form
   105,890.81/146,030.31 = 84,451.88/x
3. Step 3: Cross multiply
   105,890.81x = 146,030.31 × 84,451.88
4. Step 4: Simplify right side
   105,890.81x = 12,332,534,216.48
5. Step 5: Solve for x
   x = 12,332,534,216.48/105,890.81
6. Step 6: Final answer
   x = 116,464.63