Finding the Fourth Proportional to 2,113.61, 2,916.72 and 1,229.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.61 : 2,916.72 = 1,229.27 : x
2. Step 2: Convert to fraction form
   2,113.61/2,916.72 = 1,229.27/x
3. Step 3: Cross multiply
   2,113.61x = 2,916.72 × 1,229.27
4. Step 4: Simplify right side
   2,113.61x = 3,585,421.81
5. Step 5: Solve for x
   x = 3,585,421.81/2,113.61
6. Step 6: Final answer
   x = 1,696.35