Finding the Fourth Proportional to 491,776.31, 678,715.98 and 276,958.37

Step by Step Solution

1. Step 1: Write the proportion equation
   491,776.31 : 678,715.98 = 276,958.37 : x
2. Step 2: Convert to fraction form
   491,776.31/678,715.98 = 276,958.37/x
3. Step 3: Cross multiply
   491,776.31x = 678,715.98 × 276,958.37
4. Step 4: Simplify right side
   491,776.31x = 187,976,071,513.75
5. Step 5: Solve for x
   x = 187,976,071,513.75/491,776.31
6. Step 6: Final answer
   x = 382,238.97