Finding the Fourth Proportional to 636,061.72, 877,399.68 and 397,183

Step by Step Solution

1. Step 1: Write the proportion equation
   636,061.72 : 877,399.68 = 397,183 : x
2. Step 2: Convert to fraction form
   636,061.72/877,399.68 = 397,183/x
3. Step 3: Cross multiply
   636,061.72x = 877,399.68 × 397,183
4. Step 4: Simplify right side
   636,061.72x = 348,488,237,101.44
5. Step 5: Solve for x
   x = 348,488,237,101.44/636,061.72
6. Step 6: Final answer
   x = 547,884.31