Finding the Fourth Proportional to 2,066.15, 3,099.77 and 1,199.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.15 : 3,099.77 = 1,199.72 : x
2. Step 2: Convert to fraction form
   2,066.15/3,099.77 = 1,199.72/x
3. Step 3: Cross multiply
   2,066.15x = 3,099.77 × 1,199.72
4. Step 4: Simplify right side
   2,066.15x = 3,718,857.82
5. Step 5: Solve for x
   x = 3,718,857.82/2,066.15
6. Step 6: Final answer
   x = 1,799.90