Finding the Fourth Proportional to 210,385.82, 315,581.52 and 70,144.49

Step by Step Solution

1. Step 1: Write the proportion equation
   210,385.82 : 315,581.52 = 70,144.49 : x
2. Step 2: Convert to fraction form
   210,385.82/315,581.52 = 70,144.49/x
3. Step 3: Cross multiply
   210,385.82x = 315,581.52 × 70,144.49
4. Step 4: Simplify right side
   210,385.82x = 22,136,304,773.82
5. Step 5: Solve for x
   x = 22,136,304,773.82/210,385.82
6. Step 6: Final answer
   x = 105,217.67