Finding the Fourth Proportional to 359,660.59, 496,026.89 and 216,393.86

Step by Step Solution

1. Step 1: Write the proportion equation
   359,660.59 : 496,026.89 = 216,393.86 : x
2. Step 2: Convert to fraction form
   359,660.59/496,026.89 = 216,393.86/x
3. Step 3: Cross multiply
   359,660.59x = 496,026.89 × 216,393.86
4. Step 4: Simplify right side
   359,660.59x = 107,337,174,360.47
5. Step 5: Solve for x
   x = 107,337,174,360.47/359,660.59
6. Step 6: Final answer
   x = 298,440.19