Finding the Fourth Proportional to 2,035.62, 2,809.08 and 1,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,035.62 : 2,809.08 = 1,139.31 : x
2. Step 2: Convert to fraction form
   2,035.62/2,809.08 = 1,139.31/x
3. Step 3: Cross multiply
   2,035.62x = 2,809.08 × 1,139.31
4. Step 4: Simplify right side
   2,035.62x = 3,200,412.93
5. Step 5: Solve for x
   x = 3,200,412.93/2,035.62
6. Step 6: Final answer
   x = 1,572.21