Finding the Fourth Proportional to 208,911.89, 288,298.41 and 113,418.59

Step by Step Solution

1. Step 1: Write the proportion equation
   208,911.89 : 288,298.41 = 113,418.59 : x
2. Step 2: Convert to fraction form
   208,911.89/288,298.41 = 113,418.59/x
3. Step 3: Cross multiply
   208,911.89x = 288,298.41 × 113,418.59
4. Step 4: Simplify right side
   208,911.89x = 32,698,399,187.07
5. Step 5: Solve for x
   x = 32,698,399,187.07/208,911.89
6. Step 6: Final answer
   x = 156,517.65