Finding the Fourth Proportional to 359,658.72, 496,024.31 and 216,392.00

Step by Step Solution

1. Step 1: Write the proportion equation
   359,658.72 : 496,024.31 = 216,392.00 : x
2. Step 2: Convert to fraction form
   359,658.72/496,024.31 = 216,392.00/x
3. Step 3: Cross multiply
   359,658.72x = 496,024.31 × 216,392.00
4. Step 4: Simplify right side
   359,658.72x = 107,335,688,927.44
5. Step 5: Solve for x
   x = 107,335,688,927.44/359,658.72
6. Step 6: Final answer
   x = 298,437.61