Finding the Fourth Proportional to 497,207.48, 686,150.82 and 300,978.46

Step by Step Solution

1. Step 1: Write the proportion equation
   497,207.48 : 686,150.82 = 300,978.46 : x
2. Step 2: Convert to fraction form
   497,207.48/686,150.82 = 300,978.46/x
3. Step 3: Cross multiply
   497,207.48x = 686,150.82 × 300,978.46
4. Step 4: Simplify right side
   497,207.48x = 206,516,617,131.34
5. Step 5: Solve for x
   x = 206,516,617,131.34/497,207.48
6. Step 6: Final answer
   x = 415,353.00