Finding the Fourth Proportional to 3,455.89, 4,769.90 and 2,196.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,455.89 : 4,769.90 = 2,196.70 : x
2. Step 2: Convert to fraction form
   3,455.89/4,769.90 = 2,196.70/x
3. Step 3: Cross multiply
   3,455.89x = 4,769.90 × 2,196.70
4. Step 4: Simplify right side
   3,455.89x = 10,478,004.50
5. Step 5: Solve for x
   x = 10,478,004.50/3,455.89
6. Step 6: Final answer
   x = 3,031.93