Finding the Fourth Proportional to 208,912.89, 288,299.79 and 113,419.59

Step by Step Solution

1. Step 1: Write the proportion equation
   208,912.89 : 288,299.79 = 113,419.59 : x
2. Step 2: Convert to fraction form
   208,912.89/288,299.79 = 113,419.59/x
3. Step 3: Cross multiply
   208,912.89x = 288,299.79 × 113,419.59
4. Step 4: Simplify right side
   208,912.89x = 32,698,843,978.89
5. Step 5: Solve for x
   x = 32,698,843,978.89/208,912.89
6. Step 6: Final answer
   x = 156,519.04