Finding the Fourth Proportional to 1,401.11, 2,099.16 and 853.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.11 : 2,099.16 = 853.01 : x
2. Step 2: Convert to fraction form
   1,401.11/2,099.16 = 853.01/x
3. Step 3: Cross multiply
   1,401.11x = 2,099.16 × 853.01
4. Step 4: Simplify right side
   1,401.11x = 1,790,593.98
5. Step 5: Solve for x
   x = 1,790,593.98/1,401.11
6. Step 6: Final answer
   x = 1,277.99