Finding the Fourth Proportional to 2,219.17, 3,329.67 and 1,123.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.17 : 3,329.67 = 1,123.87 : x
2. Step 2: Convert to fraction form
   2,219.17/3,329.67 = 1,123.87/x
3. Step 3: Cross multiply
   2,219.17x = 3,329.67 × 1,123.87
4. Step 4: Simplify right side
   2,219.17x = 3,742,116.22
5. Step 5: Solve for x
   x = 3,742,116.22/2,219.17
6. Step 6: Final answer
   x = 1,686.27