Finding the Fourth Proportional to 203,418.91, 280,724.72 and 112,783.31

Step by Step Solution

1. Step 1: Write the proportion equation
   203,418.91 : 280,724.72 = 112,783.31 : x
2. Step 2: Convert to fraction form
   203,418.91/280,724.72 = 112,783.31/x
3. Step 3: Cross multiply
   203,418.91x = 280,724.72 × 112,783.31
4. Step 4: Simplify right side
   203,418.91x = 31,661,061,152.88
5. Step 5: Solve for x
   x = 31,661,061,152.88/203,418.91
6. Step 6: Final answer
   x = 155,644.63