Finding the Fourth Proportional to 208,659.78, 287,949.06 and 113,166.72

Step by Step Solution

1. Step 1: Write the proportion equation
   208,659.78 : 287,949.06 = 113,166.72 : x
2. Step 2: Convert to fraction form
   208,659.78/287,949.06 = 113,166.72/x
3. Step 3: Cross multiply
   208,659.78x = 287,949.06 × 113,166.72
4. Step 4: Simplify right side
   208,659.78x = 32,586,250,647.28
5. Step 5: Solve for x
   x = 32,586,250,647.28/208,659.78
6. Step 6: Final answer
   x = 156,169.29