Finding the Fourth Proportional to 2,123.10, 3,185.12 and 698.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.10 : 3,185.12 = 698.41 : x
2. Step 2: Convert to fraction form
   2,123.10/3,185.12 = 698.41/x
3. Step 3: Cross multiply
   2,123.10x = 3,185.12 × 698.41
4. Step 4: Simplify right side
   2,123.10x = 2,224,503.73
5. Step 5: Solve for x
   x = 2,224,503.73/2,123.10
6. Step 6: Final answer
   x = 1,047.76