Finding the Fourth Proportional to 208,609.98, 287,869.73 and 122,555.58

Step by Step Solution

1. Step 1: Write the proportion equation
   208,609.98 : 287,869.73 = 122,555.58 : x
2. Step 2: Convert to fraction form
   208,609.98/287,869.73 = 122,555.58/x
3. Step 3: Cross multiply
   208,609.98x = 287,869.73 × 122,555.58
4. Step 4: Simplify right side
   208,609.98x = 35,280,041,111.82
5. Step 5: Solve for x
   x = 35,280,041,111.82/208,609.98
6. Step 6: Final answer
   x = 169,119.62