Finding the Fourth Proportional to 8,100.79, 12,152.49 and 3,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.79 : 12,152.49 = 3,421.50 : x
2. Step 2: Convert to fraction form
   8,100.79/12,152.49 = 3,421.50/x
3. Step 3: Cross multiply
   8,100.79x = 12,152.49 × 3,421.50
4. Step 4: Simplify right side
   8,100.79x = 41,579,744.54
5. Step 5: Solve for x
   x = 41,579,744.54/8,100.79
6. Step 6: Final answer
   x = 5,132.80