Finding the Fourth Proportional to 200,640.78, 276,889.41 and 113,418.86

Step by Step Solution

1. Step 1: Write the proportion equation
   200,640.78 : 276,889.41 = 113,418.86 : x
2. Step 2: Convert to fraction form
   200,640.78/276,889.41 = 113,418.86/x
3. Step 3: Cross multiply
   200,640.78x = 276,889.41 × 113,418.86
4. Step 4: Simplify right side
   200,640.78x = 31,404,479,843.83
5. Step 5: Solve for x
   x = 31,404,479,843.83/200,640.78
6. Step 6: Final answer
   x = 156,520.92