Finding the Fourth Proportional to 210,105, 315,160.25 and 69,863.63

Step by Step Solution

1. Step 1: Write the proportion equation
   210,105 : 315,160.25 = 69,863.63 : x
2. Step 2: Convert to fraction form
   210,105/315,160.25 = 69,863.63/x
3. Step 3: Cross multiply
   210,105x = 315,160.25 × 69,863.63
4. Step 4: Simplify right side
   210,105x = 22,018,237,171.59
5. Step 5: Solve for x
   x = 22,018,237,171.59/210,105
6. Step 6: Final answer
   x = 104,796.35