Finding the Fourth Proportional to 208,042.78, 287,101.39 and 117,399.83

Step by Step Solution

1. Step 1: Write the proportion equation
   208,042.78 : 287,101.39 = 117,399.83 : x
2. Step 2: Convert to fraction form
   208,042.78/287,101.39 = 117,399.83/x
3. Step 3: Cross multiply
   208,042.78x = 287,101.39 × 117,399.83
4. Step 4: Simplify right side
   208,042.78x = 33,705,654,154.64
5. Step 5: Solve for x
   x = 33,705,654,154.64/208,042.78
6. Step 6: Final answer
   x = 162,013.09