Finding the Fourth Proportional to 2,826.55, 3,898.69 and 1,989.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.55 : 3,898.69 = 1,989.01 : x
2. Step 2: Convert to fraction form
   2,826.55/3,898.69 = 1,989.01/x
3. Step 3: Cross multiply
   2,826.55x = 3,898.69 × 1,989.01
4. Step 4: Simplify right side
   2,826.55x = 7,754,533.40
5. Step 5: Solve for x
   x = 7,754,533.40/2,826.55
6. Step 6: Final answer
   x = 2,743.46