Finding the Fourth Proportional to 209,103.86, 288,553.91 and 118,457.98

Step by Step Solution

1. Step 1: Write the proportion equation
   209,103.86 : 288,553.91 = 118,457.98 : x
2. Step 2: Convert to fraction form
   209,103.86/288,553.91 = 118,457.98/x
3. Step 3: Cross multiply
   209,103.86x = 288,553.91 × 118,457.98
4. Step 4: Simplify right side
   209,103.86x = 34,181,511,986.03
5. Step 5: Solve for x
   x = 34,181,511,986.03/209,103.86
6. Step 6: Final answer
   x = 163,466.67