Finding the Fourth Proportional to 954,196.29, 1,431,072.90 and 280,096.56

Step by Step Solution

1. Step 1: Write the proportion equation
   954,196.29 : 1,431,072.90 = 280,096.56 : x
2. Step 2: Convert to fraction form
   954,196.29/1,431,072.90 = 280,096.56/x
3. Step 3: Cross multiply
   954,196.29x = 1,431,072.90 × 280,096.56
4. Step 4: Simplify right side
   954,196.29x = 400,838,596,399.22
5. Step 5: Solve for x
   x = 400,838,596,399.22/954,196.29
6. Step 6: Final answer
   x = 420,079.81