Finding the Fourth Proportional to 429,105.76, 591,754.04 and 256,996.16

Step by Step Solution

1. Step 1: Write the proportion equation
   429,105.76 : 591,754.04 = 256,996.16 : x
2. Step 2: Convert to fraction form
   429,105.76/591,754.04 = 256,996.16/x
3. Step 3: Cross multiply
   429,105.76x = 591,754.04 × 256,996.16
4. Step 4: Simplify right side
   429,105.76x = 152,078,515,944.49
5. Step 5: Solve for x
   x = 152,078,515,944.49/429,105.76
6. Step 6: Final answer
   x = 354,408.00