Finding the Fourth Proportional to 208,105.28, 287,186.62 and 122,046.72

Step by Step Solution

1. Step 1: Write the proportion equation
   208,105.28 : 287,186.62 = 122,046.72 : x
2. Step 2: Convert to fraction form
   208,105.28/287,186.62 = 122,046.72/x
3. Step 3: Cross multiply
   208,105.28x = 287,186.62 × 122,046.72
4. Step 4: Simplify right side
   208,105.28x = 35,050,184,998.89
5. Step 5: Solve for x
   x = 35,050,184,998.89/208,105.28
6. Step 6: Final answer
   x = 168,425.26