Finding the Fourth Proportional to 447,103.59, 617,005.31 and 243,156.12

Step by Step Solution

1. Step 1: Write the proportion equation
   447,103.59 : 617,005.31 = 243,156.12 : x
2. Step 2: Convert to fraction form
   447,103.59/617,005.31 = 243,156.12/x
3. Step 3: Cross multiply
   447,103.59x = 617,005.31 × 243,156.12
4. Step 4: Simplify right side
   447,103.59x = 150,028,617,199.00
5. Step 5: Solve for x
   x = 150,028,617,199.00/447,103.59
6. Step 6: Final answer
   x = 335,556.73