Finding the Fourth Proportional to 636,058.72, 877,395.54 and 397,180

Step by Step Solution

1. Step 1: Write the proportion equation
   636,058.72 : 877,395.54 = 397,180 : x
2. Step 2: Convert to fraction form
   636,058.72/877,395.54 = 397,180/x
3. Step 3: Cross multiply
   636,058.72x = 877,395.54 × 397,180
4. Step 4: Simplify right side
   636,058.72x = 348,483,960,577.20
5. Step 5: Solve for x
   x = 348,483,960,577.20/636,058.72
6. Step 6: Final answer
   x = 547,880.17