Finding the Fourth Proportional to 8,100.21, 12,152.01 and 3,420.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.21 : 12,152.01 = 3,420.23 : x
2. Step 2: Convert to fraction form
   8,100.21/12,152.01 = 3,420.23/x
3. Step 3: Cross multiply
   8,100.21x = 12,152.01 × 3,420.23
4. Step 4: Simplify right side
   8,100.21x = 41,562,670.34
5. Step 5: Solve for x
   x = 41,562,670.34/8,100.21
6. Step 6: Final answer
   x = 5,131.06