Finding the Fourth Proportional to 2,036.20, 2,810.01 and 1,139.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,036.20 : 2,810.01 = 1,139.91 : x
2. Step 2: Convert to fraction form
   2,036.20/2,810.01 = 1,139.91/x
3. Step 3: Cross multiply
   2,036.20x = 2,810.01 × 1,139.91
4. Step 4: Simplify right side
   2,036.20x = 3,203,158.50
5. Step 5: Solve for x
   x = 3,203,158.50/2,036.20
6. Step 6: Final answer
   x = 1,573.11