Finding the Fourth Proportional to 1,401.39, 2,099.35 and 852.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.39 : 2,099.35 = 852.21 : x
2. Step 2: Convert to fraction form
   1,401.39/2,099.35 = 852.21/x
3. Step 3: Cross multiply
   1,401.39x = 2,099.35 × 852.21
4. Step 4: Simplify right side
   1,401.39x = 1,789,082.80
5. Step 5: Solve for x
   x = 1,789,082.80/1,401.39
6. Step 6: Final answer
   x = 1,276.65