Finding the Fourth Proportional to 208,796.78, 288,140.33 and 113,303.48

Step by Step Solution

1. Step 1: Write the proportion equation
   208,796.78 : 288,140.33 = 113,303.48 : x
2. Step 2: Convert to fraction form
   208,796.78/288,140.33 = 113,303.48/x
3. Step 3: Cross multiply
   208,796.78x = 288,140.33 × 113,303.48
4. Step 4: Simplify right side
   208,796.78x = 32,647,300,959.91
5. Step 5: Solve for x
   x = 32,647,300,959.91/208,796.78
6. Step 6: Final answer
   x = 156,359.21