Finding the Fourth Proportional to 105,725.28, 146,052.72 and 84,476.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,725.28 : 146,052.72 = 84,476.64 : x
2. Step 2: Convert to fraction form
   105,725.28/146,052.72 = 84,476.64/x
3. Step 3: Cross multiply
   105,725.28x = 146,052.72 × 84,476.64
4. Step 4: Simplify right side
   105,725.28x = 12,338,043,048.46
5. Step 5: Solve for x
   x = 12,338,043,048.46/105,725.28
6. Step 6: Final answer
   x = 116,699.08