Finding the Fourth Proportional to 426,131.98, 638,373.68 and 356,921.82

Step by Step Solution

1. Step 1: Write the proportion equation
   426,131.98 : 638,373.68 = 356,921.82 : x
2. Step 2: Convert to fraction form
   426,131.98/638,373.68 = 356,921.82/x
3. Step 3: Cross multiply
   426,131.98x = 638,373.68 × 356,921.82
4. Step 4: Simplify right side
   426,131.98x = 227,849,495,705.70
5. Step 5: Solve for x
   x = 227,849,495,705.70/426,131.98
6. Step 6: Final answer
   x = 534,692.32