Finding the Fourth Proportional to 200,638.94, 300,638.52 and 105,865.29

Step by Step Solution

1. Step 1: Write the proportion equation
   200,638.94 : 300,638.52 = 105,865.29 : x
2. Step 2: Convert to fraction form
   200,638.94/300,638.52 = 105,865.29/x
3. Step 3: Cross multiply
   200,638.94x = 300,638.52 × 105,865.29
4. Step 4: Simplify right side
   200,638.94x = 31,827,184,104.97
5. Step 5: Solve for x
   x = 31,827,184,104.97/200,638.94
6. Step 6: Final answer
   x = 158,629.15