Finding the Fourth Proportional to 151,921.78, 209,654.25 and 83,940.33

Step by Step Solution

1. Step 1: Write the proportion equation
   151,921.78 : 209,654.25 = 83,940.33 : x
2. Step 2: Convert to fraction form
   151,921.78/209,654.25 = 83,940.33/x
3. Step 3: Cross multiply
   151,921.78x = 209,654.25 × 83,940.33
4. Step 4: Simplify right side
   151,921.78x = 17,598,446,930.90
5. Step 5: Solve for x
   x = 17,598,446,930.90/151,921.78
6. Step 6: Final answer
   x = 115,838.87