Finding the Fourth Proportional to 208,111.69, 312,331.56 and 106,905.61

Step by Step Solution

1. Step 1: Write the proportion equation
   208,111.69 : 312,331.56 = 106,905.61 : x
2. Step 2: Convert to fraction form
   208,111.69/312,331.56 = 106,905.61/x
3. Step 3: Cross multiply
   208,111.69x = 312,331.56 × 106,905.61
4. Step 4: Simplify right side
   208,111.69x = 33,389,995,944.05
5. Step 5: Solve for x
   x = 33,389,995,944.05/208,111.69
6. Step 6: Final answer
   x = 160,442.67