Finding the Fourth Proportional to 2,770.02, 4,155.90 and 1,209.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.02 : 4,155.90 = 1,209.30 : x
2. Step 2: Convert to fraction form
   2,770.02/4,155.90 = 1,209.30/x
3. Step 3: Cross multiply
   2,770.02x = 4,155.90 × 1,209.30
4. Step 4: Simplify right side
   2,770.02x = 5,025,729.87
5. Step 5: Solve for x
   x = 5,025,729.87/2,770.02
6. Step 6: Final answer
   x = 1,814.33