Finding the Fourth Proportional to 208,140.72, 287,279.16 and 131,610.96

Step by Step Solution

1. Step 1: Write the proportion equation
   208,140.72 : 287,279.16 = 131,610.96 : x
2. Step 2: Convert to fraction form
   208,140.72/287,279.16 = 131,610.96/x
3. Step 3: Cross multiply
   208,140.72x = 287,279.16 × 131,610.96
4. Step 4: Simplify right side
   208,140.72x = 37,809,086,035.59
5. Step 5: Solve for x
   x = 37,809,086,035.59/208,140.72
6. Step 6: Final answer
   x = 181,651.56