Finding the Fourth Proportional to 208,507.78, 312,404.56 and 113,804.38

Step by Step Solution

1. Step 1: Write the proportion equation
   208,507.78 : 312,404.56 = 113,804.38 : x
2. Step 2: Convert to fraction form
   208,507.78/312,404.56 = 113,804.38/x
3. Step 3: Cross multiply
   208,507.78x = 312,404.56 × 113,804.38
4. Step 4: Simplify right side
   208,507.78x = 35,553,007,086.69
5. Step 5: Solve for x
   x = 35,553,007,086.69/208,507.78
6. Step 6: Final answer
   x = 170,511.65