Finding the Fourth Proportional to 2,193,128.10, 3,289,692.15 and 1,661,687.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,193,128.10 : 3,289,692.15 = 1,661,687.10 : x
2. Step 2: Convert to fraction form
   2,193,128.10/3,289,692.15 = 1,661,687.10/x
3. Step 3: Cross multiply
   2,193,128.10x = 3,289,692.15 × 1,661,687.10
4. Step 4: Simplify right side
   2,193,128.10x = 5,466,439,008,626.27
5. Step 5: Solve for x
   x = 5,466,439,008,626.27/2,193,128.10
6. Step 6: Final answer
   x = 2,492,530.65