Finding the Fourth Proportional to 13,131.50, 19,697.21 and 3,270.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.50 : 19,697.21 = 3,270.79 : x
2. Step 2: Convert to fraction form
   13,131.50/19,697.21 = 3,270.79/x
3. Step 3: Cross multiply
   13,131.50x = 19,697.21 × 3,270.79
4. Step 4: Simplify right side
   13,131.50x = 64,425,339.01
5. Step 5: Solve for x
   x = 64,425,339.01/13,131.50
6. Step 6: Final answer
   x = 4,906.17