Finding the Fourth Proportional to 208,978.93, 288,388.39 and 113,486.31

Step by Step Solution

1. Step 1: Write the proportion equation
   208,978.93 : 288,388.39 = 113,486.31 : x
2. Step 2: Convert to fraction form
   208,978.93/288,388.39 = 113,486.31/x
3. Step 3: Cross multiply
   208,978.93x = 288,388.39 × 113,486.31
4. Step 4: Simplify right side
   208,978.93x = 32,728,134,227.94
5. Step 5: Solve for x
   x = 32,728,134,227.94/208,978.93
6. Step 6: Final answer
   x = 156,609.73