Finding the Fourth Proportional to 2,199.77, 3,035.72 and 1,205.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.77 : 3,035.72 = 1,205.15 : x
2. Step 2: Convert to fraction form
   2,199.77/3,035.72 = 1,205.15/x
3. Step 3: Cross multiply
   2,199.77x = 3,035.72 × 1,205.15
4. Step 4: Simplify right side
   2,199.77x = 3,658,482.78
5. Step 5: Solve for x
   x = 3,658,482.78/2,199.77
6. Step 6: Final answer
   x = 1,663.12