Finding the Fourth Proportional to 208,833.98, 288,189.20 and 113,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   208,833.98 : 288,189.20 = 113,340.72 : x
2. Step 2: Convert to fraction form
   208,833.98/288,189.20 = 113,340.72/x
3. Step 3: Cross multiply
   208,833.98x = 288,189.20 × 113,340.72
4. Step 4: Simplify right side
   208,833.98x = 32,663,570,857.52
5. Step 5: Solve for x
   x = 32,663,570,857.52/208,833.98
6. Step 6: Final answer
   x = 156,409.27