Finding the Fourth Proportional to 351,978.94, 486,131.87 and 238,604.86

Step by Step Solution

1. Step 1: Write the proportion equation
   351,978.94 : 486,131.87 = 238,604.86 : x
2. Step 2: Convert to fraction form
   351,978.94/486,131.87 = 238,604.86/x
3. Step 3: Cross multiply
   351,978.94x = 486,131.87 × 238,604.86
4. Step 4: Simplify right side
   351,978.94x = 115,993,426,782.89
5. Step 5: Solve for x
   x = 115,993,426,782.89/351,978.94
6. Step 6: Final answer
   x = 329,546.50