Finding the Fourth Proportional to 209,667.33, 289,140.57 and 140,912.10

Step by Step Solution

1. Step 1: Write the proportion equation
   209,667.33 : 289,140.57 = 140,912.10 : x
2. Step 2: Convert to fraction form
   209,667.33/289,140.57 = 140,912.10/x
3. Step 3: Cross multiply
   209,667.33x = 289,140.57 × 140,912.10
4. Step 4: Simplify right side
   209,667.33x = 40,743,404,913.90
5. Step 5: Solve for x
   x = 40,743,404,913.90/209,667.33
6. Step 6: Final answer
   x = 194,324.05