Finding the Fourth Proportional to 3,123.48, 4,684.92 and 814.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.48 : 4,684.92 = 814.98 : x
2. Step 2: Convert to fraction form
   3,123.48/4,684.92 = 814.98/x
3. Step 3: Cross multiply
   3,123.48x = 4,684.92 × 814.98
4. Step 4: Simplify right side
   3,123.48x = 3,818,116.10
5. Step 5: Solve for x
   x = 3,818,116.10/3,123.48
6. Step 6: Final answer
   x = 1,222.39