Finding the Fourth Proportional to 447,103.88, 617,007.50 and 243,156.72

Step by Step Solution

1. Step 1: Write the proportion equation
   447,103.88 : 617,007.50 = 243,156.72 : x
2. Step 2: Convert to fraction form
   447,103.88/617,007.50 = 243,156.72/x
3. Step 3: Cross multiply
   447,103.88x = 617,007.50 × 243,156.72
4. Step 4: Simplify right side
   447,103.88x = 150,029,519,915.40
5. Step 5: Solve for x
   x = 150,029,519,915.40/447,103.88
6. Step 6: Final answer
   x = 335,558.53