Finding the Fourth Proportional to 559,388.72, 771,961.72 and 317,676.32

Step by Step Solution

1. Step 1: Write the proportion equation
   559,388.72 : 771,961.72 = 317,676.32 : x
2. Step 2: Convert to fraction form
   559,388.72/771,961.72 = 317,676.32/x
3. Step 3: Cross multiply
   559,388.72x = 771,961.72 × 317,676.32
4. Step 4: Simplify right side
   559,388.72x = 245,233,958,390.47
5. Step 5: Solve for x
   x = 245,233,958,390.47/559,388.72
6. Step 6: Final answer
   x = 438,396.32