Finding the Fourth Proportional to 8,100.59, 12,152.57 and 3,420.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.59 : 12,152.57 = 3,420.61 : x
2. Step 2: Convert to fraction form
   8,100.59/12,152.57 = 3,420.61/x
3. Step 3: Cross multiply
   8,100.59x = 12,152.57 × 3,420.61
4. Step 4: Simplify right side
   8,100.59x = 41,569,180.64
5. Step 5: Solve for x
   x = 41,569,180.64/8,100.59
6. Step 6: Final answer
   x = 5,131.63