Finding the Fourth Proportional to 664,003.28, 993,943.17 and 359,641.49

Step by Step Solution

1. Step 1: Write the proportion equation
   664,003.28 : 993,943.17 = 359,641.49 : x
2. Step 2: Convert to fraction form
   664,003.28/993,943.17 = 359,641.49/x
3. Step 3: Cross multiply
   664,003.28x = 993,943.17 × 359,641.49
4. Step 4: Simplify right side
   664,003.28x = 357,463,196,147.17
5. Step 5: Solve for x
   x = 357,463,196,147.17/664,003.28
6. Step 6: Final answer
   x = 538,345.53