Finding the Fourth Proportional to 3,640.55, 5,460.21 and 1,300.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,640.55 : 5,460.21 = 1,300.05 : x
2. Step 2: Convert to fraction form
   3,640.55/5,460.21 = 1,300.05/x
3. Step 3: Cross multiply
   3,640.55x = 5,460.21 × 1,300.05
4. Step 4: Simplify right side
   3,640.55x = 7,098,546.01
5. Step 5: Solve for x
   x = 7,098,546.01/3,640.55
6. Step 6: Final answer
   x = 1,949.86