Finding the Fourth Proportional to 13,002.63, 19,500.67 and 3,640.22

Step by Step Solution

1. Step 1: Write the proportion equation
   13,002.63 : 19,500.67 = 3,640.22 : x
2. Step 2: Convert to fraction form
   13,002.63/19,500.67 = 3,640.22/x
3. Step 3: Cross multiply
   13,002.63x = 19,500.67 × 3,640.22
4. Step 4: Simplify right side
   13,002.63x = 70,986,728.95
5. Step 5: Solve for x
   x = 70,986,728.95/13,002.63
6. Step 6: Final answer
   x = 5,459.41