Finding the Fourth Proportional to 492,956.82, 680,311.71 and 278,018.46

Step by Step Solution

1. Step 1: Write the proportion equation
   492,956.82 : 680,311.71 = 278,018.46 : x
2. Step 2: Convert to fraction form
   492,956.82/680,311.71 = 278,018.46/x
3. Step 3: Cross multiply
   492,956.82x = 680,311.71 × 278,018.46
4. Step 4: Simplify right side
   492,956.82x = 189,139,213,934.17
5. Step 5: Solve for x
   x = 189,139,213,934.17/492,956.82
6. Step 6: Final answer
   x = 383,683.13