Finding the Fourth Proportional to 285,478.56, 428,082.72 and 105,504.96

Step by Step Solution

1. Step 1: Write the proportion equation
   285,478.56 : 428,082.72 = 105,504.96 : x
2. Step 2: Convert to fraction form
   285,478.56/428,082.72 = 105,504.96/x
3. Step 3: Cross multiply
   285,478.56x = 428,082.72 × 105,504.96
4. Step 4: Simplify right side
   285,478.56x = 45,164,850,250.29
5. Step 5: Solve for x
   x = 45,164,850,250.29/285,478.56
6. Step 6: Final answer
   x = 158,207.50