Finding the Fourth Proportional to 208,856.11, 288,221.72 and 113,362.83

Step by Step Solution

1. Step 1: Write the proportion equation
   208,856.11 : 288,221.72 = 113,362.83 : x
2. Step 2: Convert to fraction form
   208,856.11/288,221.72 = 113,362.83/x
3. Step 3: Cross multiply
   208,856.11x = 288,221.72 × 113,362.83
4. Step 4: Simplify right side
   208,856.11x = 32,673,629,846.67
5. Step 5: Solve for x
   x = 32,673,629,846.67/208,856.11
6. Step 6: Final answer
   x = 156,440.86