Finding the Fourth Proportional to 447,100.88, 617,003.36 and 243,153.72

Step by Step Solution

1. Step 1: Write the proportion equation
   447,100.88 : 617,003.36 = 243,153.72 : x
2. Step 2: Convert to fraction form
   447,100.88/617,003.36 = 243,153.72/x
3. Step 3: Cross multiply
   447,100.88x = 617,003.36 × 243,153.72
4. Step 4: Simplify right side
   447,100.88x = 150,026,662,236.50
5. Step 5: Solve for x
   x = 150,026,662,236.50/447,100.88
6. Step 6: Final answer
   x = 335,554.39