Finding the Fourth Proportional to 2,889.79, 4,335.55 and 1,223.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,889.79 : 4,335.55 = 1,223.06 : x
2. Step 2: Convert to fraction form
   2,889.79/4,335.55 = 1,223.06/x
3. Step 3: Cross multiply
   2,889.79x = 4,335.55 × 1,223.06
4. Step 4: Simplify right side
   2,889.79x = 5,302,613.05
5. Step 5: Solve for x
   x = 5,302,613.05/2,889.79
6. Step 6: Final answer
   x = 1,834.95