Finding the Fourth Proportional to 354,131.76, 488,684.43 and 192,986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   354,131.76 : 488,684.43 = 192,986.31 : x
2. Step 2: Convert to fraction form
   354,131.76/488,684.43 = 192,986.31/x
3. Step 3: Cross multiply
   354,131.76x = 488,684.43 × 192,986.31
4. Step 4: Simplify right side
   354,131.76x = 94,309,404,900.15
5. Step 5: Solve for x
   x = 94,309,404,900.15/354,131.76
6. Step 6: Final answer
   x = 266,311.63