Finding the Fourth Proportional to 2,113.55, 2,916.18 and 1,229.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.55 : 2,916.18 = 1,229.16 : x
2. Step 2: Convert to fraction form
   2,113.55/2,916.18 = 1,229.16/x
3. Step 3: Cross multiply
   2,113.55x = 2,916.18 × 1,229.16
4. Step 4: Simplify right side
   2,113.55x = 3,584,451.81
5. Step 5: Solve for x
   x = 3,584,451.81/2,113.55
6. Step 6: Final answer
   x = 1,695.94