Finding the Fourth Proportional to 637,265.42, 878,978.31 and 419,404.67

Step by Step Solution

1. Step 1: Write the proportion equation
   637,265.42 : 878,978.31 = 419,404.67 : x
2. Step 2: Convert to fraction form
   637,265.42/878,978.31 = 419,404.67/x
3. Step 3: Cross multiply
   637,265.42x = 878,978.31 × 419,404.67
4. Step 4: Simplify right side
   637,265.42x = 368,647,608,042.71
5. Step 5: Solve for x
   x = 368,647,608,042.71/637,265.42
6. Step 6: Final answer
   x = 578,483.62