Finding the Fourth Proportional to 417,086.72, 575,376.72 and 247,200.56

Step by Step Solution

1. Step 1: Write the proportion equation
   417,086.72 : 575,376.72 = 247,200.56 : x
2. Step 2: Convert to fraction form
   417,086.72/575,376.72 = 247,200.56/x
3. Step 3: Cross multiply
   417,086.72x = 575,376.72 × 247,200.56
4. Step 4: Simplify right side
   417,086.72x = 142,233,447,394.96
5. Step 5: Solve for x
   x = 142,233,447,394.96/417,086.72
6. Step 6: Final answer
   x = 341,016.49