Finding the Fourth Proportional to 3,561.72, 5,340.01 and 1,340.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561.72 : 5,340.01 = 1,340.21 : x
2. Step 2: Convert to fraction form
   3,561.72/5,340.01 = 1,340.21/x
3. Step 3: Cross multiply
   3,561.72x = 5,340.01 × 1,340.21
4. Step 4: Simplify right side
   3,561.72x = 7,156,734.80
5. Step 5: Solve for x
   x = 7,156,734.80/3,561.72
6. Step 6: Final answer
   x = 2,009.35