Finding the Fourth Proportional to 394,886.89, 544,943.98 and 213,598.76

Step by Step Solution

1. Step 1: Write the proportion equation
   394,886.89 : 544,943.98 = 213,598.76 : x
2. Step 2: Convert to fraction form
   394,886.89/544,943.98 = 213,598.76/x
3. Step 3: Cross multiply
   394,886.89x = 544,943.98 × 213,598.76
4. Step 4: Simplify right side
   394,886.89x = 116,399,359,225.83
5. Step 5: Solve for x
   x = 116,399,359,225.83/394,886.89
6. Step 6: Final answer
   x = 294,766.33